Question

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 doing

D．is doing

Answer 1

C

考查动词的时态。因为主语的工作当时尚未完成，又处于过去的时间背景当中，所以采用过去进行时态。