1 . In the study, 145 people ______ between 19 and 32 were asked to list as many unusual uses as possible for everyday objects.

A．aging

B．age

C．aged

D．being aged

2 . Three officials ______ in the “Golden Rice” test on school children have been fired.

A．involving

B．involved

C．to involve

D．having involved

3 . The key to ________ the problem is to meet the demands ________ by the customers.

A．solving; making

B．solving; made

C．solve; making

D．solve; made

4 . Most of the people _______ to the party were famous scientists.

A．invited	B．to invite
C．being invited	D．inviting

5 . After completing and singing it, please return the form to us in the envelope _________.

A．provided

B．providing

C．having provided

D．provide

6 . —What will happen if I smoke here?
—Anyone ______ here will be punished.

A．seeing smoke	B．see smoke	C．seen smoking
D．seen smoke

7 . From the dates        on the gold coin, we know that it was made 500 years ago.

A．marking

B．marked

C．to mark

D．to be marked

8 . The music of the film   _________   by him sounds so ___________   .

A．playing, exciting	B．played, excited
C．playing, excited	D．played, exciting

9 . Sun Yat-sen ___ the first Republic in China in 1911 after he fought for the Chinese people for many years.

A．found

B．founded

C．had founded

D．founding

10 . As soon as she entered her own room, she caught sight of the gift _____ by her father.

A．buying	B．bought
C．was bought	D．being bought