It is necessary that a child’s first eye exam _____ at the age of six months old. A.was B.were C.be ...
2022-05-26 21:51:04 217次 黑龙江省牡丹江市2019-2020学年高二5月线上月考英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It is necessary that a child’s first eye exam _____ at the age of six months old.
A.was B.were C.be D.is
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