Question

【题目】If we ______ take environmental problems seriously, the earth _______ worse and worse.
A.don't; will be
B.won't; isn't
C.won't; is
D.don't; won't be

Answer 1

【答案】A
【解析】句意：如果我们不严肃对待环境问题，地球就会变得越来越糟糕。结合语境可知主句描述的是将来动作，故用一般将来时态。当主句描述将来动作时，英语条件状语从句中一般用一般现在时态。所以答案是A。