—Thelightinhisofficeisstillon.

—The light in his office is still on. Do you know _______?
—To prepare for the material(材料) the meeting will need tomorrow, I think.

A．if he works hard	B．why he stays up so late
C．why is he so busy	D．when he will stop working

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Mom, someone _________. Please pick up the phone.

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C．will call	D．was calling

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-- I have no idea.

A．where does he live	B．where he lives
C．he where lives	D．he lives where

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-- Yes. She is from ____________ United States.

A．a, the

B．an, a

C．a, a

D．an, the

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A．Her

B．His

C．Its

D．My

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Jack, ___________ play around here. Your sister is asleep now.

A．doesn’t

B．not

C．no

D．don’t

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