Question

【题目】We want to know he will come back, as we are worried about his safety.

A. how often B. how soon C. how much D. how long

Answer 1

【答案】B

【解析】试题分析：how often多久一次；how soon多久；how much多少钱；how long多长。句意：我们想知道他还有多久回来，我们很担心他的安全。结合语境可知选B。