---__________does your friend go roller skating? ---About once a week.
#60180
A
When
B
How often
C
How long
D
How much
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Let’s visit the National Museum this weekend, _______?
#64557
A
will you
B
won’t we
C
don’t we
D
shall we
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
You must have missed the first train yesterday, ________ you?
#64550
A
weren’t
B
didn’t
C
mustn’t
D
haven’t