37.I,_____ your good friend,will try my best to help you out.A.who is B.who am C.that is D.what is这是非限制性宾语从句,还是主语从句?区别?

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37.I,_____ your good friend,will try my best to help you out.
A.who is B.who am
C.that is D.what is
这是非限制性宾语从句,还是主语从句?区别?

A(I后有逗号表明是非限制性定语从句,不可以用that)

B

选B.
这是主语从句.
who后的谓语动词以主语为准选择.

A

A

A

A