阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号-优题课

China has become the first country to land a spacecraft on the far side of the moon．The unmanned Chang'e﹣4 probe（探测器）﹣ the name was inspired by an ancient Chinese moon goddess ﹣ （1）　　（touch）down last week in the South Pole﹣Aitken basin．Landing on the moon's far side is （2）　　（extreme）challenging．Because the moon's body blocks direct radio communication with a probe，China first had to put a satellite in orbit above the moon in a spot （3）　　it could send signals to the spacecraft and to Earth．The far side of the moon is of particular （4）　　（interesting）to scientists because it has a lot of deep craters（环形山），more so （5）　　the familiar near side．Chinese researchers hope to use the instruments onboard Chang'e﹣4 （6）　　（find）and study areas of the South Pole﹣Aitken basin．"This really excites scientists，" Carle Pieters， a scientist at Brown University，says，"because it （7）　　（mean）we have the chance to obtain information about how the moon （8）　　（construct）．" Data about the moon's composition，such as how （9）　　ice and other treasures it contains，could help China decide whether （10）　　（it）plans for a future lunar（月球的）base are practical．

Humor

If you see humor as an optional form of entertainment，you're missing some of its biggest benefits：Humor makes average﹣looking people look cute and uninteresting people seem entertaining．Studies show that a good sense of humor even makes you seem smarter．

Best of all，humor raises your energy，and that can have an effect on everything you do at school，at work，or in your personal life．The increase of energy will even make you more willing to exercise，and that will raise your overall energy even more．

Humor also transports your mind away from your daily troubles．Humor lets you better understand life and sometimes helps you laugh at even the worst of your problems．

In my experience，most people think they have a sense of humor，and to some degree that's true．But not all senses of humor are created equal．So I thought it would be useful to include some humor tips for everyday life．

You don't have to be the joke teller in the group in order to show your sense of humor．You can be the one who directs the conversation to fun topics that are ripe for others to add humor．Every party needs a straight person．You'll appear fun and funny by association．

When it comes to in﹣person humor，effort counts a lot．When people see you trying to be funny，it frees them to try it themselves．So even if your own efforts at humor fall short，you might be freeing the long kept humor in others．People need permission to be funny in social settings because there's always a risk that comes with humor．For in﹣person humor，quality isn't as important as you might think．Your attitude and effort count a lot．

Some people﹣and I was one of them﹣believe that humorous complaints about the little problems of life make humor，and sometimes that is the case．The problem comes when you start doing too much complaint﹣based humor．One funny observation about problem in your life can be funny，but five is just complaining，no matter how smart you think you are．Funny complaints can wear people out．

Self﹣deprecating（自嘲式） humor is usually the safest type，but here again you don't want to overshoot the target．One self﹣deprecating comment is a generous and even confident form of humor．You have to be at least a bit self﹣assured to laugh at yourself in front of others．But if you do it too often，you can transform in the eyes of others from a confident joker to a Chihuahua dog．

Humo
Benefits of humor	●Humor is form of （1）　　．Humor can improve one's （2）　　and personality． ●Humor can make one （3）　　in his work，study，and life． ●Humor has a positive（4）　　effect when we are in difficulties．
（5）　　to follow	●（6）　　others for a conversation of fun is as good as telling a joke yourself when showing your sense of humor． ●Quality counts （7）　　than attitude and effort﹣even a stupid joke can （8）　　others of risk and embarrassment．
Traps to （9）	●One humorous complaint makes funny person．But too many complaints will （10）　　your audience． ●Self﹣deprecating comments show one's assurance．But too much deprecation will make a Chihuahua dog．

Being good at something and having a passion for it are not enough．Success （1）　　fundamentally on our view of ourselves and of the（2）　　in our lives．

When twelve﹣year﹣old John Wilson walked into his chemistry class on a rainy day in 1931，he had no （3）　　of knowing that his life was to change（4）　　．The class experiment that day was to （5）　　how heating a container of water would bring air bubbling（冒泡）to the surface．（6）　　，the container the teacher gave Wilson to heat（7）　　held something more volatile（易挥发的）than water．When Wilson heated it，the container（8）　　，leaving Wilson blinded in both eyes．

When Wilson returned home from hospital two months later，his parents （9）　　to find a way to deal with the catastrophe that had （10）　　their lives．But Wilson did not regard the accident as（11）　　．He learned braille（盲文）quickly and continued his education at Worcester College for the Blind．There，he not only did well as a student but also became a（n）（12）　　public speaker．

Later，he worked in Africa，where many people suffered from（13）　　for lack of proper treatment．For him，it was one thing to（14）　　his own fate of being blind and quite another to allow something to continue （15）　　it could be fixed so easily．This moved him to action．And tens of millions in Africa and Asia can see because of the（16）　　Wilson made to preventing the （17）　　．

Wilson received several international （18）　　for his great contributions．He lost his sight but found a（19）　　．He proved that it's not what happens to us that（20）　　our lives﹣it's what we make of what happens．

（1）A． depends	B． holds	C． keeps	D． reflects
（2）A． dilemmas	B． accidents	C． events	D． steps
（3）A． way	B． hope	C． plan	D． measure
（4）A． continually	B． gradually	C． gracefully	D． completely
（5）A． direct	B． show	C． advocate	D． declare
（6）A． Anyway	B． Moreover	C． Somehow	D． Thus
（7）A． mistakenly	B． casually	C． amazingly	D． clumsily
（8）A． erupted	B． exploded	C． emptied	D． exposed
（9）A． deserved	B． attempted	C． cared	D． agreed
（10）A． submitted to	B． catered for	C． impressed on	D． happened to
（11）A． fantastic	B． extraordinary	C． impressive	D． catastrophic
（12）A． accomplished	B． crucial	C． specific	D． innocent
（13）A． deafness	B． depression	C． blindness	D.speechlessness
（14）A． decide	B． abandon	C． control	D． accept
（15）A． until	B． when	C． unless	D． before
（16）A． opposition	B． adjustments	C． commitment	D． limitations
（17）A． preventable	B． potential	C． spreadable	D． influential
（18）A． scholarships	B． rewards	C． awards	D． bonuses
（19）A． fortune	B． recipe	C． dream	D． vision
（20）A． distinguishes	B． determines	C． claims	D． limits

These days， it is not unusual for 10﹣ to 12﹣year﹣olds to publish their own websites or for second and third graders（1）　　（begin） computer classes. At the same time，computer games are becoming increasingly popular as major publishing houses continue to develop（2）　　（education） computer programs for children in preschool. Also， technological know﹣how has become a（3）　　（require） for most jobs in an increasingly digital world， as the computer has become a common tool in most（4）　　（profession）.

The Digital World is a set of volumes（5）　　aim to describe how digital systems influence society and help readers understand the nature of digital systems and their many interacting parts. Each volume in the set explores（6）　　wide range of material，explains the basic concepts of major applications of digital systems，（7）　　discusses the influences they have on everyday life. Because the number of possible topics（8）　　（be） practically limitless， we focus on a sample of the most interesting and useful applications and tools and explain the basic principles of technology. Readers（9）　　（encourage） to continue exploring the digital world with the guidance of（10）　　（we） Further Resources section featured in each volume.

When Jim Grant spotted black smoke coming out of a building on his way to work， he（1）　　his car to call 911. Then he（2）　　a U﹣turn， circling back to take another look.

Pulling up to the building， Grant saw flames （火焰） shooting out of a second﹣floor window. Not seeing or hearing any fire engines（3）　　， Grant rushed to a side（4）　　and ran up the stairs.

On the second floor， he（5）　　every apartment door."Get out!" Grant shouted. No one （6）　　and he assumed that people had already（7）　　. Reaching the end of the hallway，though，Grant（8）　　a half﹣open door. He kicked it wide open，finding a（9）　 A 　woman in a wheelchair with a little boy and a tiny baby. "Let's（10）　　!" he screamed. The woman looked at him in confusion and said something about changing her clothes. Grant didn't wait. Clutching（抓牢） the baby to his chest and（11）　　the boy alongside，Grant ran down the hallway. When he was（12）　　outside， the only（13）　　 in sight was a policeman. Grant told him about the（14）　　and they rushed into the smoky building.

Thanks to them，a family was saved from the fire. Grant and the policeman were honored for their（15）　　.

（1）A. drove	B. stopped	C. reached	D. abandoned
（2）A. saw	B. made	C. missed	D. crossed
（3）A. burning	B. leaving	C. approaching	D. waiting
（4）A. entrance	B. road	C. building	D. window
（5）A. locked	B. kicked	C. counted	D. repaired
（6）A. agreed	B. cared	C. responded	D. understood
（7）A. arrived	B. returned	C. hidden	D. escaped
（8）A. skipped	B. closed	C. noticed	D. remembered
（9）A. frightened	B. curious	C. patient	D. grateful
（10）A. turn back	B. go up	C. get out	D. lie down
（11）A. following	B. dragging	C. examining	D. passing
（12）A. safely	B. secretly	C. suddenly	D. previously
（13）A. witness	B. guide	C. service	D. help
（14）A. woman	B. door	C. car	D. baby
（15）A. wisdom	B. generosity	C. honesty	D. courage