It's n_____ for us to eat a lot of vegetables and fruit to keep health.

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It's n_____ for us to eat a lot of vegetables and fruit to keep health.
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It's n_____ for us to eat a lot of vegetables and fruit to keep health.
It's n_____ for us to eat a lot of vegetables and fruit to keep health.

It's n_____ for us to eat a lot of vegetables and fruit to keep health.
It's necessary for us to eat a lot of vegetables and fruit to keep health.

necessary

necessary

necessary

标准答案necessary

It's necessary for us to eat a lot of vegetables and fruit to keep health.
为了保持健康,我们有必要常吃蔬菜和水果。
necessary 必要的

necessary必要的