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初中英语
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单选题
1.
(2019·惠山模拟)
—The light in the professor's lab was still on at 11:00 o'clock. Do you know
?
—maybe at midnight again.
A .
how long has he worked
B .
why does he stay up so late
C .
if he is busy studying
D .
when he stopped working
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江苏无锡惠山区2019届九年级英语一模考试试卷