题目内容
7. We know that (宇航员) training is rather hard
7. astronauts’
根据对话内容，写出句中所缺单词
1. —What is the of China?
I think there will be up to 1. 4 billion people in 2017.
5. Do you know who (发明) the first computer?
6. - -Should I add any sugar to the coffee?
—No need. I (put) enough.
2. Some of my classmates hope to be (飞行员) in the future.
12. All the (航空器；飞机) at London airport were put off because of the heavy fog.
2. It is known to all that paper (invent) in China by Cai Lun long,long ago.
6. The matter will not be over until (进一步的) discussion of whys and hows.
一、 根据句意和汉语注释，写出单词的正确形式
1. Look!Do you know that (教授的) name?
