【題目】Jack in the lab when the power cut occurred.
A.works
B.has worked
C.was working
D.would work

【答案】C
【解析】題目考查時態(tài)。句意：突然斷電時，杰克正在實(shí)驗(yàn)室里工作。根據(jù)occurred可知，這里指過去發(fā)生的事情，斷電時，杰克正在工作，綜合用過去進(jìn)行時，故選C。

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