Question

______, we didn’t know each other, but now we are good friends.

A．First

B．First of all

C．At first

D．For the first time

Answer 1

C

試題分析：A. First第一； B. First of all首先； C. At first 起先；D. For the first time第一次。結合下句但是現在我們是好朋友了可知上句是起先我們彼此不認識。故選C。