语法分析--选项正确项填空,为什么?Lenses,.are used to correct imperfection in eyesight.b.in the form of glasses and contact lensesc.glasses and contact lenses which form

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语法分析--选项正确项填空,为什么?Lenses,.are used to correct imperfection in eyesight.b.in the form of glasses and contact lensesc.glasses and contact lenses which form

语法分析--选项正确项填空,为什么?Lenses,.are used to correct imperfection in eyesight.b.in the form of glasses and contact lensesc.glasses and contact lenses which form
语法分析--选项正确项填空,为什么?
Lenses,.are used to correct imperfection in eyesight.
b.in the form of glasses and contact lenses
c.glasses and contact lenses which form

语法分析--选项正确项填空,为什么?Lenses,.are used to correct imperfection in eyesight.b.in the form of glasses and contact lensesc.glasses and contact lenses which form
Lenses,_____,are used to correct imperfection in eyesight.
(A) are the forms of glasses and contact lenses
(B) in the form of glasses and contact lenses
(C) glasses and contact lenses which form
(D) glasses and contact lenses may be formed
答:B
译：透镜,通常以眼镜或隐形眼镜的形式出现,被用于矫正视力.
析：A是谓语,多出来的.
C项中的which form 没了宾语,意思不同.如果去掉which form ,则为名词,作同位语.
D项是一个句子.
逗号之间应为一个插入语,或从句,或短语.
评：这是2000年08月托福考试题.楼主最好给全题目.

你确定空格后面没有逗号？
有的话就是B 了，介词短语作非限制性定语从句修饰lenses

介词后接Be动词绝对是错的。选B

B 正确
C答案这个是啥结构啊， 定语从句又不像定语从句，又不是介词短语，根本就一点不通啊

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