Ⅰ、 1、 carry out
2、 after all
3、too crowded
4、 miss the first part of it
5、harm people
6、live on another planet
7、move away from the Earth
8、the percentage of students
Ⅱ、1、is worth
2、 helps; do
3、air pollution
4、 keep; away
5、make a guide
6、takes
7、instead
8、believe
Ⅲ、 1、 Air tank can provide many hours of air for astronauts.
2、 Which do you think is the least important?
3、Can you help me with my English?
4、 Every student has a computer at home connecting to an inter-planet computer network.
5、There are many different kinds of fashionable boots for you to choose from in our shop.
6、I can run only at the three-fourths of speed of her.
7、Food on Mars will be in the form of pills and they will not be as tasty as they are today.
8、May I use your mobile phone, Mr Lin? -Yes, you may. / Certainly.
Ⅳ、 1-5 CACBA
6-10 DBCAB
Ⅴ、 1-5 CCDDB