—Miss Li are we going to have a picnic tomorrow?—Yes. But if it we’ll do some reading i

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.