完成句子（共5小题10空；每空1分，满分10分）
1. 经济发展也带来了环境问题。
Economic development has also _________ ___________ to environmental problems.
2. 我们应该采取措施来防止地球受污染.
We should __________ _____________ to prevent the earth from being polluted.
3．我们要尽一切办法使他振作起来。
We tried every means to get him to ___________ _____________.
4．他们很穷，但还是设法把儿子送去大学读书。
They were poor, but they__________ ___________ send their son to college.
5. 我为昨天所做的事向你道歉。
I ______________ ____________ you for what I did yesterday.
I hate ______ when people call me by my nickname (绰号).
A. that B. one C. it D. 不填
Can you see that building ______ by trees? That’s ______ we study.
A. surrounded; which B. surrounding; where
C. to be surrounded; in which D. surrounded; where
Sir, you ________ take this seat. It’s just for the old.
A. oughtn’t to B. can’t C. won’t D. needn’t
______ life began on earth is one of the biggest puzzles that scientist found hard ______.
A. How; solving B. When; to be solved
C. How; to solve D. Which; to solve
Was it because his mother was ill ______ he didn’t go to school?
A. so B. that C. why D. when
