He must be helping the old man to water the flowers,________?
#64494
A
is he
B
isn't he
C
must be
D
mustn't he
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--- _________is your telephone number?---It’s 86222216.
#59955
A
How much
B
How many
C
What
D
How
The student must be working very hard, ________?
#64521
A
doesn’t he
B
mustn’t he
C
needn’t he
D
isn’t he