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-Another cup of coffee?That's your third since lunch. -Yeah, well, I all night p

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-Another cup of coffee?That's your third since lunch. -Yeah, well, I all night p

-Another cup of coffee?That's your third since lunch.

-Yeah, well, I ________ all night preparing for my history exam.I can hardly keep my eyes open.

[]A.

stayed up

B.

have stayed up

C.

have been staying up

D.

will stay up

试题答案

答案:A