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

試題分析：考查時態(tài)。句意：Susan決定不在家里做這個計(jì)劃，因?yàn)樗幌胱屗母改钢浪谧鍪裁�。根�?jù)句意說明不想父母知道在過去的時間所做的事情，故使用過去進(jìn)行時。故C正確。
考點(diǎn):考查時態(tài)
點(diǎn)評：時態(tài)的考查要放在上下文語境中進(jìn)行，本題的關(guān)鍵在于理解句意：她不想讓她的父母知道她在做什么。
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