He hasn’t finished his homework ________.

[　　]

Put it down, Richard. You mustn’t read ________ letter.

[　　]

The teacher asked all the students in the class to keep their eyes ____.

[　　]

Do you know ________ at the bus stop?

[　　]

A．whom they are waiting for

B．who they are waiting

C．whom are they waiting for

D．who are they waiting

Could you tell me if it ________ tomorrow?

[　　]

—________ I put my coat here?

—Sorry, you ________.

[　　]

Five-year-old children are too young to go to school, ________?

[　　]

Many people watched the boys ________ the mountain at that time.

[　　]

The man ________ Mary was so tall that she could hardly see the show.

[　　]

—Have you finished ________ the book?

—Not yet. I’ll try ________ it to you before Friday.

[　　]