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。
Everybody in David’s class packed their bags and got ready_____ (go) home last Saturday. Usually David’s mother would fetch him home but that day she was not there, so he walked home by himself.
When he reached home, he knocked on the door as he didn’t bring his keys. _____ (surprising), no one answered the door. He
____ (knock) again when one of his neighbors
_____ (name) John called him. He told David his mother was out and invited him to stay in his house till his mother came back. David knew that if his mother
_____ (be) at home, she would have answered the door soon. So David went to John’s house and played with him.
____ (stay) in John’s house for a few
____ (hour), David saw his mother came back. They thanked John and his family. It turned out that David’s mother had
_____ serious backache so she had to see the doctor.
From this experience, David has learnt that neighbors are people ______ help each other, and that the relationships among neighbors are like
___ (build) a bridge, and that most people have been building a bridge and they will build a good bridge one day.
One morning, I was waiting at the bus stop, worried about _____ (be) late for school. There were many people waiting at the bus stop, ___
___ some of them looked very anxious and __
__(disappoint) . When the bus finally came, we all hurried on board. I got a place next ___
___ the window, so I had a good view of the sidewalk. A boy on abike __
_ (catch ) my attention. He was riding beside the bus and waving hisarms. I heard a passenger behind me shouting to the driver, but he refused _
__ (stop) until we reached the next stop. Still, theboykept ____
___(ride). He was carrying something overhisshoulder and shouting. Finally, when we came to the next stop, the boy ran up the door of thebus. I heard an excited conversation. Then the driver stood up and asked,“__
___ anyone lose a suitcase at the last stop?” A woman on the bus shouted, “Oh, dear! It ‘s ___
___ (I )”. She pushedherway to the driver and took the suitcase thankfully, Five others on the bus began talking about what the boy had done and the crowd of strangers __
__(sudden) became friendly to one another.
With the ________ (develop) of industry, air pollution
_______ (get) more and more serious. In Beijing, many people suffer different kinds of illnesses as a result of air pollution.
Air pollution is caused by the following__________: about half of the problem is caused by transportation. There are more and more cars, buses on the roads, and they give off
_________ (harm) 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.
__________ everybody realizes the importance of environment and does something to stop pollution, the problem will
________ (solve).
阅读下面短文，根据以下提示：1）汉语提示，2）首字母提示，3）语境提示，在每个空格内填入一个适当的英语单词，所填单词意义准确，拼写正确，并将该词完整地写在答题卡中相应的横线上。
It had rained for a few days. I felt very____________（厌烦的）. But it became fine last Sunday morning. So I got up early and decided to go for a walk and take some p________
____ in the
__________（美丽的）country. After breakfast, I carried a camera with me and set ___
_____. Everything went smoothly. I enjoyed my trip so much that I didn’t
（意识到）the weather had turned bad again. I began to run and it was too late. I was c
in the rain and was wet through. I kept on running u
I got to the bus stop. I stood there w
a long time for the bus shivering with cold. Shortly
I got home, I had a high fever,
made me stay in bed for a whole week!
Imagine shopping in another country and spotting a beautiful scarf. The salesperson tells you the price, ______ it’s more than you want to buy. What do you do?
The answer depends largely on what part of the world you are in. Are you visiting Southeast Asia, the Middle East, Latin America or Africa? In these places, prices often are not set in stone. In fact, customers _____(expect) to bargain before agreeing to a price.
On the other hand, in North America, Europe and Australia, bargaining is rare and often not allowed. The price ___(list) on a price tag cannot be changed.
Large stores and malls usually don’t allow bargaining. On the other hand, outdoor stalls and flea markets, even in Western countries, usually allow bargaining. When in doubt, consult a guidebook ---or_______(good) yet, a local friend.
_____bargaining custom vary, a few rules of etiquette apply in most cultures. First, avoid wasting people’s time. If you don’t intend to make a purchase, don’t start bargaining. While bargaining, it is OK to walk away. But once you agree to a price, you
____ buy the item.
Even in countries ___ don’t allow bargaining, you may find plentiful opportunities to save money. Many stores sell old items on clearance. Others offer discount cards to regular customers. Some of these can function as credit cards
____ the store, and a few can even be used elsewhere.
______ you go, understanding local customs can help you find good prices.
Blood is important to support our lives. But for now, the only way we can get more of it is through donation. And donated blood has its own problems. First of all, certain blood types are extremely rare. Type O negative blood (O-), for example, only (exist) in 7 percent of people, according to Sunday Times. There are fewer
(donate) and therefore there isn’t enough of this type of blood for everybody who needs it. In addition, donated blood comes from various people, which means that it has to
(examine) carefully for diseases such as HIV to make sure that it’s safe for transfusion(输血).
This is__ scientists all over the world have been trying to make blood in labs. And now, someone finally succeeded—Marc Turner at the Scottish National Blood Transfusion Service has produced blood fit for transfusion, reported Forbes. Different from many ____
scientists, who have tried to make blood by mixing up different ingredients together, Turner chose to grow blood
(direct) from human stem cells. He developed
special technique to create a chemical environment similar to that in our bone marrow (骨髓). This environment encourages stem cells to develop fully
red blood cell.
According to Turner, his artificial blood is (likely) to contain disease viruses or produce side effects. And the best part is that
he managed to produce was type O- blood. Not only is it a rare blood type, it’s also a universal type, which means it can be transfused into any patient.