1 . The building ____________ (build) now is our classroom building. (所给词的适当形式填空)

2 . ______________ (wait) in the queue for half an hour, the old man suddenly realized he had left the cheque in the car. （所给词的适当形式填空）

3 . ______ his task, he went home and found his house ______, so he had to call the nearby police station immediately.

A．Having finished; broken out	B．Finishing; broken into
C．Having finished; broken into	D．Finished; breaking out

4 . ________ it many times, I still can’t make Tom understand what I said.

A．Explaining	B．Having explained
C．To explain	D．Having been explained

5 . She didn’t expect the great trouble she had ________ the problem ________ currently.

A．to solve; discussing	B．solving; to be discussed
C．to solve; discussed	D．solving; being discussed

6 . _______(suffer) from heart disease for years, Professor White has to take medicine with him wherever he goes. (所给词的适当形式填空)

7 . ___________ (say) that she didn’t do a good job, I don’t think I am abler than her. （所给词的适当形式填空）

8 . _______________ (show) around the Water Cube, we were then taken to see the Bird’s Nest for the 2008 Olympic Games. （所给词的适当形式填空）

9 . ______ (visit) several times over the last 10 years, I was amazed by the co-existence of old and new, and how a city was able to keep such a rich heritage (遗产) while constantly growing. (所给词的适当形式填空)

10 . At the beginning of class, the noise of desks _______________________ (open and close) could be heard outside the classroom. （所给词的适当形式填空）