Students__ to hand their homework in the teachers every morning.A.need B.need not C.doesn't needD.not need

need可作情态动词也可作行为动词。
情态动词肯定：need do sth. 否定：needn't do sth.
行为动词肯定：need(s) to do sth. 否定：doesn't /don't need to do sth.
所以只能选A。

A
need 就两种用法。做情态动作或实义动词。
在这题目中是实义动词用法 need to do sth
情态动词用法时后面的动词只能用原形不能出现to 那就应该是need hand their homework

Students__ to hand their homework in the teachers every morning.A.need B.need not C.doesn't need D.not need
选项是A。
因为to hand their homework 是不定式短语，说明need不作情态动词。need是实意动词.

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A

need to do sth 有必要做某事
=needn't do sth

　　A 。need 每天早上学生们需要上交他们的作业给老师

选A。
B中need 如果在后面直接加not否定表示need是情态动词，后面加动词原形，不用不定式。
C doesn't是第三人称单数形式，而主语students是复数。
D语法错误。

首先主语是students,因此是复数,排除C,D用法是错的只能用don‘t need
A、B语法上都没问题,但是通过意思学生需要（不需要）每天早上交给老师作业~需要就是A,不需要就是B,在我看来A还是最妥当的~

A