Question

— What’s your plan for this weekend? — We will go for a picnic by the river _______ it rains.

— What’s your plan for this weekend? — We will go for a picnic by the river _______ it rains. A．unless B．if C．but D．because

Answer 1

A
试题分析：unless除非，如果不；if是否，如果；but但是，可是；because因为；句意：你这个周末的计划是什么？——如果不下雨，我们要去河边野餐。计划语境可知选A。