1 This is my twin sister Lucy.Both she and I-----good at drawing Ais B are指同一概念吧,为什么选B

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1 This is my twin sister Lucy.Both she and I-----good at drawing Ais B are指同一概念吧,为什么选B

1 This is my twin sister Lucy.Both she and I-----good at drawing Ais B are指同一概念吧,为什么选B
1 This is my twin sister Lucy.Both she and I-----good at drawing Ais B are指同一概念吧,为什么选B

1 This is my twin sister Lucy.Both she and I-----good at drawing Ais B are指同一概念吧,为什么选B
同一概念是指成套成对出现的东西,以及约定俗成的东西,比如knife and fork, needle and thread, fish and chips等等,bread and butter就是约定俗成的,作单一概念来讲,后面要用is
twin虽然是指双胞胎,但不是必然成对的,所以she和I是两个不同的主体,这里就需要用are
满意请按采纳键