根据必修二 Unit 3--5词汇表内容，在空白处填入1个适当的单词或括号内单词的正确形式。
1.The city is dotted with small lakes, natural and a__________.
2.Please accept this gift in a__________ of all you've done for us.
3.Learning a musical i__________ introduces a child to an understanding of music.
4.This is the s__________ where the famous director always made the films.
5.I looked forward to the __________(研究，探讨) of their theories.
6.__________(失业) is so damaging both to individuals and to communities.
7.I saw what was happening, but I was __________(power) to help.
8.Millions of people want new, __________(simplify) ways of interacting with a computer.
9.You can pay bills over the Internet. __________(addition), you can check your balance.
10.The product was developed in __________(respond) to customer demand.
Over the past 12 months the company ______ a 10 percent improvement.
A. managed B. manages
C. had managed D. has managed
He ______ in the village for three months, then moved to a nearby city.
A. stayed B. has stayed
C. would stay D. was to stay
I ______ to take a French course this summer, but I changed the plan later.
A. planned B. have planned
C. was planning D. had planned
Attempts must be made to ______ the barrier(隔阂) between the two communities.
A. break up B. break through
C. break down D. break off
The boy pretended ______ asleep when his father came back.
A. to fall B. to have fallen
C. to be falling D. have fallen
