1 . It worried her a bit _____ her hair was turning grey.

A．what

B．that

C．which

D．while

2 . It was in the lab _______ was taken charge of by Professor Smith __________ they did the experiment.

A．which; that

B．that; where

C．that; which

D．where; that

3 . 单句语法填空
1. Can you think of another example __________ this phrase can be used?
2. I don’t think the reason __________ he explained at the meeting was reasonable.
3. It’s in the Summer Olympics ______ you have the running races, together with swimming, sailing and all the team sports.
4. It was also a treasure decorated with gold and jewels, ________ took the country’s best artists   about ten years to make.
5. However, the next King of Prussia, Frederick William I, ________ the amber room belonged, decided not to keep it.
6. Have you ever dreamed of playing in front of thousands of people at a concert, ___________ everyone is clapping and appreciating your music?
7. I developed very slowly and it took nearly two hundred years ________ I was built as an analytical machine by Charles Babbage.
8. Last year, we were travelling across the Channel and Jane put a piece of paper _________ her name and address on it into a bottle.
9. Only athletes who have reached the agreed standard for their event will ______ (admit) as competitors.
10. First as a PC (personal computer) and then as a laptop, I ________ (use) in offices and homes since the 1970s.

4 . Students are sure to benefit from every minute _______ the best use of to study their lessons.

A．which makes

B．what they make

C．that is made

D．when is made

5 . He made a promise          he would help me.

A．that

B．which

C．whether

D．why

6 . They will fly to Washington, ________ they plan to stay for two or three days.

A．where

B．there

C．which

D．when