His neck was ________ by scarf(围巾) ________ the night air.

[　　]

He was praised at the meeting ________ having done the wonderful work .

[　　]

It' s two years ________ they left the city.

[　　]

The young man made a mistake last week, ________ the boss dismissed him .

[　　]

To ________, he found several children ________ in a pool without anyone's help.

[　　]

When you meet new words, don' t always ________ in the dictionary .

[　　]

Look, ________ bikes ________ over there.

[　　]

That old man has been living here ________.

[　　]

We could not understand them because ________ of us knew their language .

[　　]

Is he still working?

Yes, he ________ all the afternoon and he ________ yet .

[　　]

A．is working, hasn't finished

B．has worked, isn't working

C．has been working, has finished

D．has been working, hasn't finished