potatoes ( ) A is a vegetable B are a vegetable Cis a kind of vegetable D are vegetables

问题描述:

potatoes ( ) A is a vegetable B are a vegetable Cis a kind of vegetable D are vegetables
请大家帮忙看看选哪个合适 ,为什么?

B.are are kind of vegetable
Potatoes are a kind of vegetable.
马铃薯是一种蔬菜.
potatoes是复数,显然后面不能是a vegetable,从而可以否定A
is a 也与主语s不一致,否定C
D.虽然与主语一致,但它只是一种蔬菜,因此不能用vegetable(这里是指种类)