----________ have you been studying at school?
----For more than four years．
A．How often B．How long
C．How old D．How far
-________ some bananas?
-Good idea.
A. Why eat B. Why don’t
C. Why not eat D. Why not to eat
----Can you tell me ______ live a low-carbon(低碳) life ?
----OK. By using both sides of the paper.
A．where’s B．why to C．when to D．how to
There are different kinds of presents in the gift shop. I can’t decide _______.
A. to buy what B. to buy which
C. what to buy D. which to buy
The book is well worth _________ and I plan _________one.
A. reading; to buy B. reading; buying
C. read; to buy D. to read; buying
Flowers in the park _______ sweet when spring comes.
A. taste B. smell C.watch D. feel
