You may keep the pen if you like, I've got plenty of ________.

[　　]

I don't remember how many years ago ________ people began to grow crops.

[　　]

The police ________ the murderer everywhere when he suddenly appeared in a village.

[　　]

They did some repairs ________.

[　　]

________ production up by 60%, the company has had another excellent year.

[　　]

－The meeting has begun and ________ he will come.

－Of course, he is sure to come. He'll speak at the meeting.

[　　]

The whole building ________ burned down, but the heavy rain ________.

[　　]

A．might have; would help

B．could have been; helped

C．must have; helped

D．should have been; was helping

－Somebody wants you on the telephone.

－________ no one knows I'm here.

[　　]

－Bob, put the ________ in the water.

－OK, I'll see how long they will stay ________?

[　　]

－How did you interview go?

－I couldn't feel ________ about it! I seemed to find an answer for all of the questions.

[　　]