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
—__________ have you stayed in New York?—For about two weeks.
#59914
A
How soon
B
How often
C
How long
D
How much
—          do you exercise?— Twice a week.
#59848
A
How long
B
How many
C
How often
D
How soon
He must have lived here for 10 years,  ____ he?
#65368
A
mustn't
B
haven't
C
didn't
D
hasn't
---____do you go to work?---I take a bus.
#59936
A
When
B
Where
C
How
D
What time