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Susan decided not to work on the program at home because she didn't want her par

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Susan decided not to work on the program at home because she didn't want her par

Susan decided not to work on the program at home because she didn't want her parents to know what she ________.

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A.has done

B.had done

C.was doing

D.is doing

试题答案

答案:C

解析:

过去进行时表示过去某段时间正在发生的事.从主句didn't want可知,现在完成时和现在进行时都是错误的.