--I regret not telling Alice my new address and telephone number.

--That's too bad. You ________ when you meet.

[　　]

A. should have told her

B. must have told her

C. should tell her

D. must tell her

I ________ up here night after night for weeks now. You see, I ________ to give you a surprise.

[　　]

A. have come; hoped

B. have been coming; hoped

C. have come; was hoping

D. have been coming; was hoping

There used to be a high tower here, ________ ?

[　　]

The classroom is so dirty that it requires ________ badly.

[　　]

I need one more stamp before my collection ________.

[　　]

________ troubles me is _______ I can't learn all these English idioms by heart.

[　　]

-- ________ is the man?

--He's a teacher, ________ is clear from his manner.

[　　]

--Don't you know I make the decision here?

--________ , not until you ________ me.

[　　]

He has to go to see the doctor，___________?

[　　]

The pilot lost contact with the military base, ________ the plane crashed in desert.

[　　]

A．by means of which

B．for which

C．because of that

D．as a result of which