Humans will have ______ fresh air in10 years than now．
A. much less B．much
C．very little D．fewer
---____ are you going to keep healthy? ---I’m going to exercise more.
A. How B. When C. What
–What about playing tennis this Sunday?-- _____. Anything is OK.
A. I like it.
B. I don’t mind.
C. I can’t stand it.
–What will you do tomorrow?-I’m not sure. I _____ go shopping.
A. will B. might C. must
.I will take a trip ____ the afternoon of May 1st.
A. in B. at C. On
I ______ anything about it _____ you told me.
A.didn’t know， when
B. didn’t know， until
C. knew， until
