【題目】They _________ any help because they can do it by themselves.
A.don't need to
B.don't need
C.doesn't need
D.doesn't need to

【答案】B
【解析】句意：他們不需要任何幫助，因為他們可以自己做。they復數(shù)人稱，需借助do+not構成否定句。根據(jù)句意和語境，故選B。

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