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---          a month do you do voluntary work ? ---Twice a month.
#59864
A
How long
B
How many times
C
How much
D
How often
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To deliver a "Chinese dream", we need to push ahead with reforms and ensure economic growth and people's well-being, ______?
#64640
A
mustn't we
B
don't we
C
needn't we
D
won't we
What a foolish child ,_______?
#64470
A
isn’t he
B
doesn’t he
C
hasn’t he
D
isn’t it
─         my hat?─It’s on Tom’s chair.
#60248
A
Where’s
B
Who’s
C
What’s
D
How is
---________ is your mother’s birthday?--- It’s on 1 August.
#60087
A
Where
B
When
C
What
D
Which
--- ________ under the tree?      --- No，they aren’t.　　   
#60372
A
Where are
B
What is
C
Are they
D
Is it