—____ does Jane exercise?—Four times a week.
#60119
A
How soon
B
What time
C
How long
D
How often
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Scientists don’t think that a warm winter always has a negative influence on our life,____?
#64541
A
don’t they
B
do they
C
hasn’t it
D
has it
He must have known the truth yesterday, _________?
#64623
A
haven’t you
B
didn’t you
C
have you
D
did you
--__________ you see the traffic accident near the park yesterday? -- No, I didn’t.
#60289
A
Did
B
Do
C
Have
D
Are