1 . It can be hard for you to imagine what trouble I have had __________ the problems referred to in the meeting __________ last week.

A．to deal with; held	B．dealing with; held
C．to deal with; being held	D．dealing with; being held

4 . ________by a shark was what used to happen in those days.

A．kill

B．killing

C．killed

D．being killed

6 . A sleep study published in the journal Sleep Health suggests that those who walk ________ more will experience better quality and duration of sleep.

A．barely

B．incredibly

C．slightly

D．ultimately

7 . Governments throughout the world act on the assumption ________ the welfare of their people depends on the economic strength and wealth of the community.

A．which

B．that

C．what

D．whether

8 . —To be frank, with so much work ________ my mind, I almost ________.
—Take it easy! Why not go for a walk to refresh yourself before getting down to business?

A．occupying; break down	B．occupied; break down
C．occupying; break up	D．having occupied; break up

9 . Students receiving poor grades, which ________ brings about negative self-recognition, are likely to be on the high-risk list of dropping out.

A．in contrast

B．in effect

C．in turn

D．in return

10 . A series of policies ________ in the years ahead to attract international students to return home.

A．are introduced	B．have been introduced
C．were introduced	D．will be introduced