It is important ____A:to stay health B:to stay healthy C:stay health D:stay healthy

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It is important ____A:to stay health B:to stay healthy C:stay health D:stay healthy

It is important ____A:to stay health B:to stay healthy C:stay health D:stay healthy
It is important ____
A:to stay health B:to stay healthy C:stay health D:stay healthy

It is important ____A:to stay health B:to stay healthy C:stay health D:stay healthy
B

B:to stay healthy

这里stay相当于be动词,保持的意思,=keep,be
stay后面接形容词,所以选择B

stay为系动词,后面接形容词作表语,全句来说,to stay healthy为主语,it为形式主语代替to stay healthy,D为动词短语不能作主语

it's important to do sth 是一个固定表达。stay后面应该接一个形容词表状态,所以选B。healthy是一个形容词