The radio says it will heavily tomorrow.A. rainB. rainyC. to rainD. raining

问题补充：

The radio says it will heavily tomorrow.

A. rain

B. rainy

C. to rain

D. raining

答案：

(答案→)A. rain

B. rainy

C. to rain

D. raining

解析：本题考查动词rain的使用。本题的含义为广播说明天将会下大雨，助动词will后跟动词原形，rain为动词下雨的含义，而rainy为形容词下雨的含义，raining为现在分词，to rain为动词不定式，都不符合题意，故本题选A。