题目内容

---What ____ Mr. Jones ____ ? ---He is walking over the bridge.

A. do, do
B. are, doing
C. is, doing

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Look, the man and the woman _______ for the bus.

A. are, waiting
B. is, waiting
C. waiting

____ not ____ that tree.

A. Is, climbing
B. Do, climb
C. Are, climbing

Are they _____ a bus at the bus stop?

A. wait for
B. waiting
C. waiting for

You must _____ the tap. (关上水龙头)

A. turn off
B. turn on
C. turn down

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