It is no use ________ him to give up smoking． He won’t listen!

When ________ questions in class, one should answer them as clearly as possible.

To tell you the truth, if you want to study abroad, you must pay more attention to ______English every day.

She told me _______ a noise in the hall .

      in a white uniform, he looks more like a cook than a doctor. 

       herself with other girls,she feels she is quite lucky.    

____ a letter from her parents, Lily is now looking forward to ___ from them.
A Having not received; hear        B. Not received; hear
C.  Not having received; hearing    D. Receiving not; hearing

I can’t imagine_____ that with such a famous author.

---You were brave enough to raise objections at the meeting.
---Well, now I regret ____ that.   
A. to do    b. to be doing   C. to have done    D. having done

Unless ___ to speak，you should remain silent at the conference．