B
这里的need不是情态动词,从后面跟了to play动词不定式看出来的,是个实义动词,因此其疑问要用do作助动词构成,前半句是肯定句,后半句用否定,所以就是don't they?
They need time to play or think____?A.needn't they B.don't t
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