1 . In order to finish the teachers’ assignments , students have to stay up late, which contributes to their body _______ _______ (崩溃，垮掉) （根据汉语提示完成句子）

2 . Dr Yuan Longping searched for a way to increase rice harvests without _________(expand) the area of the field. （所给词的适当形式填空）

3 . 阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Like other big cities, Paris has also a traffic problem: lots of cars, traffic jams and traffic pollution. So since 2007, the city     1    (start) a plan to improve the situation.

Under a project, people can take a bicycle, use it as long as they want, and then leave it at the same or another bicycle station. The first half-hour is free,     2     if you don’t return it after 30 minutes, you have to pay. It’s only $1 or $29 a year. The bicycles are as heavy as 25 kilograms, and they’re all grey and have baskets. There’re a large number of     3    (they) in the city, and the bicycle stations are more than the subway stations!

Paris isn’t the first city to operate a project like this. One Parisian said, “These bicycles are only suitable for short     4    (journey). If people want to travel across the city, they won’t use a bicycle — they’ll still use their cars.”

A city spokesman said, “The bicycle project won’t solve all our traffic problems, but it might work in     5    (reduce) air pollution. Traffic, together with factory fumes,     6    (be) a big problem. Everyone knows about global warming and dramatic climate changes — we know this is partly because rainforests are     7    (gradual) disappearing. And it’s also because there’s so much pollution. There aren’t any simple answers     8     traffic problems and pollution in cities, but the bicycles might help people lead     9     healthier life. Unless we do something now, there’ll be more traffic jams and temperatures will continue to rise, so the problems in our environment will get even     10    (bad).”

4 . This shocking news led to ____________ out of the room and nobody dared to stop him.

A．him stormed	B．that he stormed
C．him to storm	D．him storming

5 . It’s no use ________ without taking action.

A．complain

B．complaining

C．being complained

D．to be complained

6 . David was very unhappy for ____ to the party which was held in his cousin’s house.

A．having not been invited	B．not having invited
C．not having been invited	D．having not invited

7 . In the darkness, she felt ________, but when she turned around, nobody was there.

A．to follow	B．following
C．to be followed	D．being followed