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意為“在……之前”,常與完成時(shí)連用。上句的時(shí)態(tài)是一般過去時(shí),所以要用過去完成時(shí),表示動(dòng)作發(fā)生在was very nervous之前,因?yàn)樗郧皼]有乘坐過飛機(jī),所以感到緊張。