1 . When you’re finished with the book, don’t forget to put it back on the shelf, ________?

A．to do

B．don’t you

C．will you

D．wouldn’t you

2 . Few of them hurt themselves in the accident last night, __________?

A．don’t they

B．didn’t they

C．did they

D．do they

3 .        on the light in the bathroom，or you will experience an unfortunate fall.

A．Turn	B．Turning
C．Being turn	D．Having turn

4 . ______ your score and see how many points you get in the final test.

A．Add up

B．Add to

C．Add up to

D．Adding up

5 . On the whole, frequently ______ in a wide variety of activities and older adults are less likely to feel depressed.

A．participate

B．to participate

C．participating

D．participated

6 . _______ the website of the Fire Department in your city, and you will learn a lot about Firefighting.

A．Having searched

B．To search

C．Searching

D．Search

7 . ______ at the door before you enter my room, please.

A．Knock

B．Knocking

C．Knocked

D．To knock

8 . Join a guided bike tour and ________（view）some of the most popular monuments in Washington, D.C. (所给词的适当形式填空）

9 . Lose one hour in the morning ________ you will be looking for it the rest of the day.

A．but

B．and

C．or

D．so

10 . Give me a chance, ________ I’ll give you a wonderful surprise.

A．if

B．or

C．and

D．while