Question

【题目】Only after the second tower of the World Trade Centre did people know it was not an accident, but an attack of some kind.

A. had hit

B. did fall

C. was hit

D. was fallen

Answer 1

【答案】C

【解析】 该句为一个倒装句，句首部分为after引导的时间状语从句。世贸大厦与撞击(hit)之间是被动关系，所以应选C。