Tom,do you really enjoy surfing the Internet?Yes.It'_________
A. such a great fun B.such great fun C.so great a fun D.so great fun
为什么选B?
China today is no longer_______it used to be.
A.that B.which C .what D.where
为什么选C ?
I can't stop playing computer games.For your health my boy. I'm afraid you _____
A. can B .may C.must D.have to
为什么选D