问题

What are you doing____ summer vacation?[ ]
A: about
B: in
C: for
D:at
B: in
C: for
D:at
正确答案是:
同类题型
What do you think is the best way tothe pollution problem?
I spent five yuan on this pen. =” I” spent five yuan buying this pen.
Andy, are you learning Lesson this week?— No. We are learning lesson now.
There is ______in today’s newspaper.
The woman newsreader has gone to live abroad. She won’t appear on TV ______. [ ]