Children __________ sleep nine hours a day.[ ]A. ought to B. ought C. oughtn't D. oughtn't

题目简介

Children __________ sleep nine hours a day.[ ]A. ought to B. ought C. oughtn't D. oughtn't

题目详情

Children __________ sleep nine hours a day.

[     ]

A. ought to
B. ought
C. oughtn't
D. oughtn't to
题型:单选题难度:偏易来源:期中题

答案

A

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