问题补充:
We aren’t sure of the weather. We sightseeing unless it tomorrow.
A. will go; won’t rain
B. won’t go; doesn’t rain
C. will go; rains
D. won’t go; rains
答案:
A. will go; won’t rain
B. won’t go; doesn’t rain
(答案→)C. will go; rains
D. won’t go; rains
解析:句意:我们对天气不确定。我们明天去观光旅行,除非天下雨。在含有条件状语从句的复合句中,如果主句用一般将来时,那么从句只能用一般现在时,所以选C。