.________ on the subject for half an hour, Liu Ying suddenly stopped.A.To be workedB.To workC.Having

题目简介

.________ on the subject for half an hour, Liu Ying suddenly stopped.A.To be workedB.To workC.Having

题目详情

.
________ on the subject for half an hour, Liu Ying suddenly stopped.
A.To be workedB.To work
C.Having workedD.Having been worked
题型:单选题难度:偏易来源:不详

答案

C

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