16. I an invitation from one of my friends but I have no idea it or not.A. received; wh

问题补充：

16. I an invitation from one of my friends, but I have no idea it or not.

A. received; whether to accept

B. accepted; whether to receive

C. got; if to accept

D. got; if I accepted

答案：

(答案→)A. received; whether to accept

B. accepted; whether to receive

C. got; if to accept

D. got; if I accepted

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