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Teachers        be sensitive to the development level of each student so as to help them better.
A.canB.mayC.are able toD.need to
D

试题分析:考察情态动词用法。A能够,可能;B也许;C能够;D需要;本题中的动词need是一个行为动词,后面直接接不定式;如果need作为情态动词,通常用于疑问句或者否定句。句义:为了帮助孩子们更好地发展,老师需要对每个孩子的发展水平很敏感。根据句义说明D正确。
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