1 . They don't allow ______ here．That is to say，we are not allowed _____ here．

A．to smoke； to smoke	B．smoking； smoking
C．to smoke； smoking	D．smoking； to smoke

2 . In our company missing a day’s work means ________ 50 yuan.

A．losing

B．to lose

C．lose

D．to be losing

3 . The teacher asked his students to stop ________ and ________ the blackboard carefully.

A．talking; looking at

B．to talk; to look at

C．talking; to look at

D．to talk; looking at

4 . Dr.Yuan invents super hybrid rice, making it possible to increase rice harvest without e___________(扩大；伸展)the area of the field. (根据汉语提示单词拼写)

5 . Can you imagine________the work in twelve hours?

A．he finishes

B．him finishing

C．him finish

D．him to finish

6 . Exercise is the key ______ your health．

A．to improve

B．to improving

C．in improving

D．of improving

7 . I never dreamed of there _____ such a quiet place in the noisy city.

A．is

B．are

C．being

D．be

8 . The doves seemed to enjoy_____with people in the park.

A．having photographed	B．being photographed
C．to be photographed	D．photographing

9 . You can’t imagine the difficulty he ____ into the cold river and saving the drowning girl.

A．had to jump	B．had jump
C．had jumping	D．had jumped

10 . The library needs _______, but it’ll have ________ until Sunday.

A．to clean; to wait	B．to clean; waiting
C．cleaning; to wait	D．cleaning; waiting