All mammals have hair, but not always evident.A、but it is notB、but it isC、but

游客2023-12-30  19

问题 All mammals have hair, but not always evident.

选项 A、but it is not
B、but it is
C、but they are not
D、but they are

答案 A

解析 句意:所有的哺乳类动物都有毛发,但并不总是明显的。but后面句子的主语应指代前面的hair,而不是all mammals,所以主语应用it。B项中应该用否定形式,所以答案为A。
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