“____ old are you?” “I'm twelve.”
A. Who
B. What
C. Where
D. How
查看答案
“Can you answer this question, Sam?” “No, I ____.”
A. can't
B. needn't
C. mustn't
D. may not
They usually have a meeting ____ Monday.
A. in
B. for
C. on
D. at
There ____ three balls in the box.
A. is
B. are
C. isn't
D. am
Kate was late for school yesterday, ____ she?
A. is
B. isn't
C. wasn't
D. was
微信支付 
支付宝支付