I will stay at home and read books if it heavily tomorrow.A. snowB. will snowC. snowsD. i

问题补充：

I will stay at home and read books if it heavily tomorrow.

A. snow

B. will snow

C. snows

D. is snowing

答案：

A. snow

B. will snow

(答案→)C. snows

D. is snowing

解析：句意：如果明天下大雪，我就会呆在家里读书。if 如果，引导条件状语从句，从句应用一般现在时，主句用一般将来时。snows 是第三人称单数形式。故选C。