— Do you know why he left so early?
—_______for the English test, I guess.

1 often hear her __.this song. Listen! Can't you hear her___ in the next room?.
A. sing; sing      B. singing; singing    C. sing; singing 

Water Park is a good place _ .

My parents often ask me _________ too much time ______ computer games.
A. not to spend; playing      B. not to spend; to play       C. to not spend; play

Since you are tired, you’d better＿＿＿and have a good rest.
A. stop to study      B.    stop study    C.  stop studying

Class is beginning. Please stop_           .
A. talking B. to talk C. talk

The new treatments ______by Norman Bethune helped a number of soldiers.
A. invent          B. invents        C, inventing      D. invented

Take time lo relax by listening to music, reading a book or just spending some time alone.
Relaxing allows you            to your students with more energy.
A. return               B. to return       C. returning

--- Excuse me, could you tell me how ______ to Beijing Zoo?
　　--- Well, you may take Bus No.27.

When people want to relax themselves, they prefer     TV or listen to music rather
than     newspapers.
?