The young girl sitting next to me on the plane was very nervous. She_____before.
The young girl sitting next to me on the plane was very nervous. She_____before.
A. hasn't flown
B. didn't fly
C. hadn't flown
D. wasn't flying
答案:C
解析:before意为“在……之前”,常与完成时连用。上句的时态是一般过去时,所以要用过去完成时,表示动作发生在was very nervous之前,因为她以前没有乘坐过飞机,所以感到紧张。