Question

vegetables are good for us.为什么用are?

Answer 1

因为菜也是复数的，所以负数就要用are
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Answer 2

原因:
1. 主语是复数vegetables
2. be good for 对…有好处；对……有益；对…有作用

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如对本题有疑问可追问，Good luck!

Answer 3

选 A is
对应主语是fast food. 单数

Fruit and vegetables are good for your health，but fast food，like potato chips is not.
水果和蔬菜是对你健康有益的, 但速食食品却不是, 像薯条.

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Answer 4

vegetables are good for us.为什么用are?
vegetables是复数，所以要用are.

Answer 5

1. 主语是复数vegetables
2. be good for 对…有好处；对……有益；对…有作用