问题补充:
—Miss Li, are we going to have a picnic tomorrow?
—Yes. But if it , we’ll do some reading instead.
A. will rain
B. rains
C. is raining
D. rained
答案:
A. will rain
(答案→)B. rains
C. is raining
D. rained
解析:句意:李老师,明天我们要去野餐吗?——是的,但是如果明天下雨,我们就要读书了。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表示将来动作,从句主语it为单数第三人称,故谓语动词用单数,选B.