-- What are they doing now? -- They are busy________ the dinner.
A. prepare for
B. prepares for
C. prepared for
D. preparing for
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--________people are there in your family? --Three.
A. How often
B. How long
C. How many
D. How much
Running is a good exercise ______ it helps build a strong body.
A. how
B. where
C. because
D. unless
I like booking tickets online,because it is _________.
A. boring
B. confident
C. convenient
D. expensive
How ______ it rained yesterday! We had to cancel(取消)our football match.
A. heavily
B. light
C. lightly
D. heavy