–Look at that girl! Is it Susan? --No, it _______ be her. She went to her hometown just now.
#77302
A
mustn’t
B
can’t
C
needn’t
D
wouldn’t
推荐题目
 This book _____ Lucy’s. Look! Her name is on the book cover.
#75339
A
must be
B
may be
C
can’t be
D
mustn’t be
Mary ______ my letter; otherwise she would have replied before now. 
#63420
A
has received
B
ought to have received
C
couldn’t have received
D
shouldn’t have received
-May we leave the classroom now?-No, you _______. You _______ to leave until the bell rings.
#74240
A
can't; are allowed
B
mustn't; aren't allowed
C
needn't; are allowed
D
needn't; aren't allowed