The child ought to have a rest; she ______ the piano for nearly three hours
问题描述：
The child ought to have a rest; she ______ the piano for nearly three hours
A.had practiced B.ispracticing
C.has been practicing D.practices
答
C
现在完成进行,表示现在依旧在练弹钢琴,故提出【该休息一下了】6. You ______ all the calculationsof the students' scores. We have the computer software to do that job.
A. needn't have done B. mustn'thave done C. shouldn't have doneD. couldn't havedoneA
根据语境：
你_____做学生的分数统计工作，我们有计算机软件做。
横线上填【本没必要】