Susan was doing the housework while her son ____the machine.(repa_英语解答

Susan was doing the housework while her son ____the machine.(repair)
A.repairs B.repaired C.was repairing D.is repairing

人气：394 ℃　时间：2020-04-16 07:07:20

解答

C
was doing 过去进行时,和主句的was doing the housework 照应.
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