2.It is important for us()something about first aid.A.know B.to know C.knowing D.knows

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2.It is important for us()something about first aid.A.know B.to know C.knowing D.knows
2.It is important for us()something about first aid.A.know B.to know C.knowing D.knows

2.It is important for us()something about first aid.A.know B.to know C.knowing D.knows
B
一定正确

答案选B.to know

b. to know
it's important for sb to do sth

B 固定用法 it is + 形容词+ for sb to do sth

B

It is important for us to know something about first aid
该句考的是一个常用的句子结构:
It is/was adj for sb to do sth
做某事对某人来说是怎么样的。
应该选B

B

B