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Susan decided not to work on the program at home because she didn’t want her parents to know what she ______. 
A.has done B.had done C.was doingD.is doing
C

试题分析:考查时态。句意:Susan决定不在家里做这个计划,因为她不想让她的父母知道她在做什么。根据句意说明不想父母知道在过去的时间所做的事情,故使用过去进行时。故C正确。
考点:考查时态
点评:时态的考查要放在上下文语境中进行,本题的关键在于理解句意:她不想让她的父母知道她在做什么。
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