第 1 题 · 六级
The taxi driver hailed a passerby to ask the way, which saved him from getting lost.
核心词：hail heɪl v. 招呼，向……欢呼
出租车司机招呼路人问路，这让他没有迷路。
一般过去时主谓宾 + 目的不定式 + which 从句 + save sb from短语 hail a taxi短语 hail a passerby
The taxi driver ___ a passerby to ask the way, which saved him from getting lost.
第 2 题 · 六级
The gang picked their victims at random, which frightened the whole neighbourhood.
核心词：random ˈrændəm adj. 随机的；n. 随机
这伙人随机挑选下手对象，整个街区都人心惶惶。
一般过去时主谓宾 + 介词短语 + which 从句短语 at random短语 a random number
The gang picked their victims at ___, which frightened the whole neighbourhood.
第 3 题 · 六级
He managed to stagger home after the long walk, which tired him completely.
核心词：stagger ˈstæɡə v. 蹒跚，摇晃
走了很长的路后，他好不容易才蹒跚着回到家，累得精疲力尽。
一般过去时manage to do + 时间状语 + which 从句短语 stagger home短语 stagger under
He managed to ___ home after the long walk, which tired him completely.
