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
推荐题目
—Didn't the robot have a rest?—_______. Because it never gets tired.
#59733
A
Yes, it did
B
No, it didn't
C
Yes, it had
D
No, it hadn’t
--- _______ are the London Olympics?--- In about 14 months. We are looking forward to the great scene.
#59885
A
How long
B
How far
C
How soon
D
How often
Look! The ground is wet. It must have rained last night, ________？
#64460
A
hasn't it
B
hadn't it
C
mustn't it
D
didn't it
I don’t think a warm winter always has a negative influence on our life, _______?
#64814
A
do I
B
does it
C
hasn’t it
D
don’t I