I am not sure （).

I am sure the secretary who has just been hired will prove to be an efficient (employ) ______.

A.from

B.to

C.than

D.for

A.that

B.about that

C.of what

D.what

A.am I

B.isn’t I

C.aren’t I

D.am not I

I really appreciate ()to help me,but I am sure that I will be able to manage by myself.

A、you to offer

B、your offering

C、that you offer

— I am sorry for what I have said to you.

—_____________

A: No problem.

B; I'm sure about that.

C; Don't think any more about it.

A.whether

B.what

C.when

D.how

A.for

B.on

C.in

D.about

—Could I see your ticket please？rn—________________

A、I am not sure yet

B、I'd love one

C、I might be. Why？

D、Here you are.

A. I am sure you ______ it if you had hurrie

B.would catch

C.would have caught

D.could catch

E.had caught