1. The price of the houses will rise rapidly if it ____________（not control）.
2. — Doctor, I’m very worried about my son’s height these days.
　　— Nothing serious, madam. He ____________（develop）normally. After all, he’s just 13.
3. Years ago we didn’t know this, but recent science ____________（show）that people who don’t sleep well are more likely to have thin hair.
4. — I’m sick of the busy traffic every morning!
　　— Don’t worry. It’s said that a new road ____________（complete）soon.
5. This is the only way we can imagine ____________（reduce）the overuse of water.
6. I hear he ____________（write）a novel last month. I wonder if he has finished it yet.
7. I can’t believe that she kept you ____________（wait）so long.
8. — Have you finished your homework, Lucy?
　　— Not yet, Mum. I ____________（do）it at once.
9. There ____________（be）little snow here over the past three years.
10. My father ____________（work）in a factory for five years. But now he is a teacher.

1. isn't controlled 2. is developing 3. has shown 4. will be completed
5. to reduce 6. was writing 7. waiting 8. will do
9. has been 10. worked

Space suits don’t just make astronauts look cool. Without these __1__ suits, astronauts wouldn’t be able to leave their spaceship. That is to say, they wouldn’t be able to __2__ on the Moon or work outside the Space Station.
Space is a __3__ place for human beings. First, there is no air to breathe. Second, space also has high levels of radiation（辐射）— energy that can pass through our bodies and make us __4__. Third, some parts of space are really cold __5__ other parts are very hot. So astronauts could die in just a few seconds if they __6__ outside their spaceship without their suits.
With a space suit, though, astronauts can move around in space for several hours.
Space suits keep astronauts __7__ sealed（密封的）inside.
A backpack sends O₂ in to let astronauts breathe normally.
At the same time, the CO₂ __8__ astronauts breathe out is sucked away（吸走）.
The suit also protects them from harmful radiation and fast - moving space dust.
__9__ the space suit is another suit that looks like a pair of tight pajamas（睡衣）with little pipes running through them.
Water runs through these pipes to __10__ astronauts because wearing a space suit can make astronauts very hot!
( 　)1. A. private B. special C. plastic D. cheap
( 　)2. A. run B. walk C. live D. surf
( 　)3. A. funny B. natural C. beautiful D. dangerous
( 　)4. A. sick B. bored C. strong D. relaxed
( 　)5. A. after B. since C. before D. while
( 　)6. A. rushed B. looked C. left D. laid
( 　)7. A. safely B. quickly C. quietly D. terribly
( 　)8. A. who B. this C. that D. whether
( 　)9. A. Above B. Under C. Behind D. Between
( 　)10. A. wash away B. warm up C. cool off D. clean out

1-5 BBDAD 6-10 AACBC