10、—Why do you look so tired，Steven? You must have stayed up late last night，_______?
—Yes．I ______ busy with my preparation for the exam of late．
A．didn’t you；have been B．haven’t you；had been
C．needn’t you；was D．mustn’t you；am
10、A
科目：高中英語 來源： 題型：
—Why do you look so tired，Steven? You must have stayed up late last night，_______?
—Yes．I ______ busy with my preparation for the exam of late．
A．didn’t you；have been B．haven’t you；had been
C．needn’t you；was D．mustn’t you；am
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