---How much shall I pay for the phone call? ----You ____ .This is free of charge.
#87315
A
shouldn’t
B
can’t
C
needn’t
D
mustn’t
推荐题目
So far it has been suggested that special stress _____ on pre-school education. 
#86589
A
is laid
B
be laid
C
has been laid
D
have been laid
He       have come here yesterday,        he?
#87985
A
mustn’t, did
B
couldn’t, has
C
must, haven’t
D
must, didn’t