Question

【题目】It is reported that natural disasters displaced 22 million people last year. _________ more action is taken, the problem will get dramatically worse.

A. If B. Unless C. After D. When

Answer 1

【答案】B

【解析】考查状语从句。句意：据报道，自然灾害去年迫使两千两百万人流离失所。如果不采取更多的应对措施，这一问题将变得极其严重。A. If如果；B. Unless如果不，除非；C. After在......之后；D. When当……的时候；既然。根据句意可知，这里的意思是“如果不”，故选B。