Question

【题目】The environment will be much worse ___________ everyone has a sense of protecting it.

A. unlessB. ifC. so that

Answer 1

【答案】A

【解析】

句意：除非每个人都有保护环境的意识，否则环境会更糟。考查连词辨析。unless除非，表条件，相当于if not；if如果，表条件；so that以便于，表目的。本句是条件状语从句，根据句意语境，可知if不合句意，故选A。