1 . I have told you ________ but you still make the same mistake.

A．over and over again	B．again and again
C．time and time again	D．all of the above

2 . Sam ________ a kettle full of boiling water onto his legs.

A．got over

B．knocked out

C．took over

D．knocked over

3 . First ________ is a temporary form of help ________ to someone who suddenly falls ill or gets injured before a doctor can be found.

A．favor；to give

B．benefit；giving

C．aid；given

D．help；give

4 . They worked day and night about three days ___________ everything returned to normal.

A．until

B．after

C．when

D．before

5 . The walls of the rooms are said ___white in no time.

A．to be painted

B．painted

C．to paint

D．having been painted

6 . In autumn, leaves turn yellow and _________ the trees.

A．fall out

B．fall off

C．fall down

D．fall over

7 . I hoped Tina _________ to my birthday party next Thursday.

A．to come

B．is coming

C．will come

D．was coming

8 . —I’m sorry to ________ you, but could you tell me the way to the nearest supermarket?
—I will do some shopping too. Shall we walk there together?

A．bother

B．resist

C．affect

D．award

9 . With a database like this, you can ________ anything you want in no time.

A．refer to

B．turn to

C．look up

D．make up

10 . Police in America have stepped up their search ________ a fifteen-year-old boy ________ went missing three days ago in Dover, New Hampshire.

A．of; who

B．for; who

C．of; he

D．for; he