The little boy is sleeping. You        make noise here.

Xiao Ming will go to Beijing for a visit. I         him         a good trip.

This kind of paper is          wood.

More sheep          by the farmer since two months ago.

Don’t talk with your partners in class_______ you are asked to do so.
A. if         B. when         C. unless

Waste water ____________________into Xiang River.It’s our duty to keep it clean.
A. shouldn’t be poured    
B. mustn’t pour     
C. can’t pour

I’ll leave as soon as he _____.

---What did Lu Xun do after he gave up medicine?
---He devoted ______writing all his life.

—______ is Mr Brown?
—He is a teacher.
A. Where            B. Who          C. What

You'd better keep the medicine somewhere safe, out of the children's 　　　 .