There’s going to be tomorrow so we’d better stay at home.A. rainyB. rain C. raining D. ra

问题补充：

There’s going to be tomorrow, so we’d better stay at home.

A. rainy

B. rain

C. raining

D. rains

答案：

A. rainy

(答案→)B. rain

C. raining

D. rains

解析：句意：明天将会有雨，所以我们最好待在家里。there be 结果表示存在有，有雨要用其名词形式。故选B。