The thief hid himself in the chimney _____ someone should catch him in the act.

A. when
B. but that
C. lest
D. where


【参考答案】

C.解析：句意为“小偷躲藏在烟囱里，以防在他作案时被人抓到。”lest引起的目的状语从句，从句中用了should+动词原......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)