____ of the twins are very outgoing.A Each B Both C All

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____ of the twins are very outgoing.A Each B Both C All

b be动词为are,each 用is, twins是双胞胎,all指3个以上

both
twins一般指2人,both也指2人

B
A后动词单数
C必须三人或以上
所以B

c

B

both

B 因为are所以选复数both