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【题目】It is necessary that a child’s first eye exam _____ at the age of six months old.

A.wasB.wereC.beD.is

【答案】C

【解析】

考查虚拟语气在主语从句中的运用。句意:孩子的第一次眼睛检查必须在六个月大的时候进行。固定句型:It is necessary that 主语+should+动词原形+其他。该句型中谓语动词用should加动词原形,且should可以省略。故选C

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