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

Yesterday, as I approached the front door of our public library, a white-haired gentleman stepped back to hold the door for me. You see, I have to go everywhere these days with a walker, and folks are _________ (constant) holding or opening doors for me, so this was not unusual.
However, I told the gentleman that the door had _______ automatic opener, and he did not need to stay to hold it open. He said “Here I thought I would have an opportunity to be _________ (help).”
At that, I backed up, let the door close, and allowed him to reopen the door, not ________ (use) the automatic control this time. His comment then was “Well, now I feel like that I _______ (accomplish) something helpful and worthwhile today.”
We never know_________ someone else is feeling. We seniors seem to feel we can take care of ________ at all times. That random act of kindness brightened not only my day, but to my joy and delight, also the day of that white-haired senior citizen. I felt a glow for the rest of the day, and,________ (hope), so did he!
So, gentle readers, never hesitate ________ (offer) kindness. You may find to your ________ (amaze) that there is more kindness in your community than you ever believe possible.

Late in September, a photo show was held in our school．
It lasted a week and was a great success! All the photos were tby the students themselves．They were ____（大多数）color photos，butsome are black-and -white ones, pour school life, the beautyof nature, festival activities and so on．All the _（作品）of art wereon display in the ___（图书馆）on the second floor．Every day a greatnumber of students went to enjoy __, and they were surprised tofind the photos werewonderful that some teachers also werepresent．Those w __photos were chosen the best were given differentprizes. In short, this photo show rmade our life more colorful.
We hope we will have more activities like this in thef.

人们对于学生网上交友持不同意见，请用英语写一篇关于学生网上交友的短文，介绍人们的不同意见，并表达自己的看法。
赞成的理由是：1 广交朋友；2 可自由表达思想；3 利于外语学习。
反对的理由：1 浪费时间；2 影响学习；3 可能上当受骗
你的看法是：......
注意：
1 文章必须包括以上全部内容。
2 词数100词左右。
3 参考词汇：网络朋友on-line friend ，上当受骗 to be cheated .

With the __________ （develop）of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because _________ air pollution. Air pollution is caused by the following_________: about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off _________( poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health ________ to others._________ these, about 10% of air pollution is caused by other reasons. We should take some measures to fight _________ pollution. New fuel can be used to take _________ place of gas. We can plant more trees. If everybody realizes the ________（important）of environment and does something to stop pollution, the problem will__________（solve）.

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
The Sahara Desert,(cover) most of North Africa, is the largest desert in the world. From north to south the Sahara is between 800 miles 1200 miles and is at least 3000 miles from east to west. Due to the large size of the Sahara, Africa is split into two regions: thatlies above or forms part of the Sahara and the rest of Africa south of the Sahara. On the west, the Sahara is (border) by the Atlantic Ocean and on the east by the Red Sea, and to the north are the Atlas Mountains and Mediterranean Sea. Over 25 percent of the Sahara's surface is covered by sand sheets and dunes.
The Sahara's climate consistsbasically two sub-climates ,a dry subtropical climate in the north and a dry tropical climate in the south. The dry tropical climate is(general) characterized by mild, dry winters, a hot dry season just before the rainy season, and an annual temperature cycle. The dry subtropical climate, ,is characterized by (annual) high temperature ranges, cold winters, hot summers and two rainy seasons. There is a narrow strip in the western portion of the Sahara, the coast, which generally has cool temperatures (compare) to the rest of the Sahara because of the influence of the cold Canary Current.