1 . —What’s the matter with Coco?

—She has a headache because she __________ too long; she ought to stop working now.

A．has been reading

B．was reading

C．reads

D．had read

2 . —Hi, George, you look exhausted.
—Yes, I am exhausted. I ________ (paint) the cafeteria all day. (所给词的适当形式填空)

3 . The study ______ (investigate) the impact of violent TV programming on children over the last two years. (所给词的适当形式填空)

4 . Jacob ________ with several of his colleagues on a big project and they still have a long way to go.

A．has worked

B．works

C．was working

D．has been working

5 . I ________ on my paper this morning in the library.

A．have been worked	B．have worked
C．have been working	D．had worked

6 . I have been ______(占据) myself with preparing for the birthday party, shopping and decorating the house. (根据汉语提示单词拼写)

7 . Since humankind started gardening, we ________ to make our environment more beautiful.

A．try

B．are trying

C．will try

D．have been trying

8 . They had been ______(辩论) for several hours without reaching an agreement. (根据汉语提示单词拼写)

10 . Joseph ________ to evening classes since last month, but he still can’t say “What’s your name?” in Japanese.

A．went

B．was going

C．has been going

D．is going