Haveyoufoundyourbookyet?No,I’m

--Have you found your book yet?
--- No, I’m not sure where I________ it?

A．leave

B．had left

C．could have left

D．was to leave.

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B．used up

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A．admiration

B．assistance

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A．have worked

B．worked

C．was working

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A．who; who

B．that; which

C．who; that

D．who; which

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—Do you mind if I open the window?
—________.I feel a bit cold.

A．Of course not

B．No, please don’t.

C．I’d rather you didn’t

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