--Must we stay here waiting for you? --No, you ______. A.needn't B.can't C.shouldn't
Nancy, sweep the classroom, _______?
The dog _______ played with you just now is _______.
Three million _______ a large number. You can make it _______.
Over fifty countries _______ the AIIB(亚投行) so far.
It is _______ a beautiful garden _______ we like to play in it.