I, who ______ your close friend, will try my best to help you out of trouble.

I, who ______ your close friend, will try my best to help you out of trouble.

A．am              B．is                C．are              D．be

I, who ______ your close friend, will try my best to help you out of trouble.

1. A.
   am
2. B.
   is
3. C.
   are
4. D.
   be

I, who ________ your close friend, will try my best to help you out of trouble.

[　　]