题目内容：

She looks tired and ___ have a rest. A. need to B. needs to C. needs D. does to need
She looks tired and ___ have a rest.
A. need to B. needs to
C. needs D. does to need
我知道选B但是为什么选B

优质解答

she是第三人称,后面动词应为第三人称单数,排除A.
need有个固定搭配：need to do sth
D选项的话,do 作为助动词,在这里没有does to need的用法
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