1 . The research,         by Tsinghua University, shows that different parents have different approaches to these problems.

A．conducted

B．to conduct

C．conducting

D．to be conducted

2 . _________ by the Chinese women’s volleyball team in the final matches, Serbia lost the chance to seize gold medal.

A．Defeating

B．Defeated

C．Having defeated

D．To defeat

3 . ________ correctly, ordinary soap can deal with bacteria effectively.

A．Used

B．To use

C．Using

D．Use

4 . Fear is one of the many enemies hidden inside us, and if________ uncontrolled, it can destroy our lives.

A．left

B．to be left

C．leaving

D．having left

5 . ________ from space, the earth, with water________ 70% of its surface, looks like a blue ball.

A．Seen; covered

B．Seen; covering

C．Seeing; covering

D．Seeing; covered

6 . You'd better keep him ________ of any change of address as soon as possible.

A．informing

B．informed

C．to inform

D．inform

7 . ________ from his parents, and ________ that he has wasted too much time, the boy is determined to stop playing video games.

A．Pressing; realizing	B．Pressed; realized
C．Pressing; realized	D．Pressed; realizing

8 . When________ why he was sent there, he said he was sent there ________ for a space flight.

A．asking, being trained

B．asked, to be trained

C．to ask, trained

D．asked, training

9 . Can you tell me something about the new hospital that the mayor is eager to have ________ next month?

A．constructed

B．constructing

C．to construct

D．been constructed

10 . With his eyes _________ on the family album, he thought of the fun he had when he lived with his parents.

A．fixing

B．fixed

C．to be fixed

D．being fixed