阅读下面材料，在空白处填入适当的内容(一个单词)或括号内单词-优题课

MOOC，a massive open online course，(aim)at providing large-scale interactive participation and open access via the web．MOOCs first made waves in the fall of 2011，when Professor Sebastian Thrun from Stanford University opened his graduate-level artificial (intelligent)course up to any student anywhere，and 160，000 students in more than 190 countries (sign)up．This new kind online classes is shaking up the higher education worid in many ways．Since the courses can be taken by hundreds of thousands of students at the same time. number of universities might decrease dramatically．Perhaps the most striking thing about MOOCs，many of are being taught by professors at famous universities，is that they’re free．This is (certain)good news for cash-strapped students．
There is a lot of excitement and fear surrounding MOOCs．While some say free online courses are a great way (increase)the enrollment of minority students，others have said they will leave many students behind．Some critics have said that MOOts promote an unrealistic one-size-fits-all model of higher education that there is no replacement for true dialogues between professors and their students．After all，a brain is not a computer．We are not blank hard drives (wait)to be filled with data．People learn from people they love and remember the things that arouse emotion．

As we all know, games play a very important role in the growth of children. Children should grow along with playing games; for, they can not only acquire knowledge playing games, but also train their abilities to get along with others.
However, most children are faced with completely different situation. Most parents fear that games will prevent children from increasing new knowledge and the children will fail in the future examinations. So, instead of letting the children themselves find and learn naturally from their surroundings, force their children to take part in various kinds of classes, learning English, playing the piano or practising drawing, etc. , some parents put away the children’s toys which are very useful in developing children’s imagination and practical abilities.
is a piece of good advice to those parents: you want to expect your child to be able to accomplish something, you must first of all develop his ability to adapt the new surroundings. That kind of education can lead to nothing but a failure in the children’s growth.

When I was young, we lived in what is now a forest preserve. People had the bad habit of abandoning dogs, ______ drove my poor mother crazy! We were not rich and already had a dog.
Looking out of the window my mother complained to us about the________(responsible) and cruel person, who had just thrown a dog. We _________(tell) to stay away from the dog as we could not afford it. I felt _________(extreme) upset, and I couldn’t believe my mother refused to help the animal. She said, “Here we are not the only one. Let _________take care of the creature.
_____poor dog lay at the end of the driveway and hardly moved. I was very sad, ___ dared not say anything to my mother. ________(late) that day I couldn’t find my mother in the house. I looked in every room but she was gone. Then I saw my mother _____ (come) home with the dog. We kids ran outside to greet our new friend. My mother didn’t say ______she had changed her mind. It’s not what you say. It’s what you do.

A young man and an old man were waiting for a bus at a station. sat next to each other. “What’s that in your bag?” asked the young man, (point)to a big bag beside the the old man.
“Gold. There is nothing but gold,” answered the old man. The young man could not believe his own ears. “What?” he said to himself in surprise. Then he began to think about to get the gold .The old man was tired and it seemed that he could hardly keep his eyes open. After a while,the old man(lie) down and he fell asleep.
The young man took the big bag (gentle). But when he was just going to run away , he found a corner of his fur coat was under the old man’s body . Several times, he tried to pull it out, in vain. At last he took off his coat ,thinking that the gold in the bag must be ____ (value) than his fur coat Worried but _____ (delight), the young man ran out of the station as quickly as his legs could carry him, he reached a place, he thought the old man couldn’t find him, he stopped and quickly opened the bag.
But he just found a great many stones in it. He ran back tothe station(hurry) only to find the old man was gone.

Old age may not sound_______ (excite).But recent findings provide good news for older people and for people worried about(get) older.
The findings came from_______ survey of more than 340,000 adults in the United States. The Gallup Organization questioned________ by telephone in 2008.At that time, the people were between the ages of eighteen and eighty-five.
The researchers asked questions about emotions like happiness, _______(sad) and worry. They also asked about mental or emotional stress. The research team found that levels of stress were ________ (high) among adults between the ages of twenty-two and twenty-five. Stress levels dropped ______ (sharp) after people reached their fifties.
Happiness _______ highest among the youngest adults and those________ their early seventies. The study also showed that men and women have similar emotional patterns as they grow older. ______ , woman at all ages reported more sadness, stress and worry than men.