He must be helping the old man to water the flowers,______ ?
#65512
A
is he
B
isn’t he
C
must he
D
mustn’t he
推荐题目
--- ________ your sister a student?---No, she ________.
#60121
A
Is; is
B
Is; isn’t
C
Are; is
D
Are; isn’t
You must have waited here for a long time ,___________you?
#65489
A
mustn't
B
didn't
C
haven't
D
hadn't