1 . There is a rule in the library that one is required to put the book ______ it is after finishing reading it.

A．what

B．how

C．where

D．when

2 . In order to make full use of the energy, many water power stations are built ______ there are big waterfalls.

A．unless

B．so that

C．where

D．whether

3 . Several years later, Helen and Zhou Mei met again in New York and they picked up their friendship ________ it left off.

A．where

B．what

C．how       .

D．when

4 . I didn’t see Peter enroute (在途中) but reunited back ________ we started, both of us sheepish but pleased. （用适当的词填空）

5 . Every one of you,   ______ the basketball field used to be, quickly please.

A．gathers where

B．gather where

C．will gather at

D．gather at

6 . The new tough regulation will apply even ________the platform provider is abroad.

A．where

B．in which

C．to which

D．what

7 . It was reported that many high buildings were put up         there used to be a desert, which made some foreign experts amazed.

A．when

B．where

C．how

D．what

8 . 在涉及孩童成长方面，专家建议切勿拔苗助长，应遵循客观规律。(where) (汉译英)

9 . 单句改错
1. When first introducing to the market, these products enjoyed great success.
2. Looking forward to hearing from you as soon as possibly.
3. One afternoon where I was in primary school, I was walking by the school playground.
4. I’m sorry you’ve been waiting so long, but it’ll still be some time when Brian gets back.
5. A number of high buildings have arisen in where there was nothing a year ago but ruins.
6. I like this jacket better than that one, but it costs almost three times so much.
7. I hurried to the spot at the moment I heard the news.
8. While time goes by, we’ll be older and older.
9. The first time when I went there, they were living in a small house with dogs, ducks, and other animals.
10. When they will return from the US, we’ll give them a warm welcome.

10 . Natural bird habitats are most commonly found ________ there is an ample supply of water for drinking, swimming, and bathing. （用适当的词填空）