Look at the ! It’s heavily now. A. rain, rainB. raining, rainingC. rain, rainingD. rain

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A. rain, rain
B. raining, raining
(答案→)C. rain, raining
D. raining, rain
解析：结合定冠词the及谓语动词可知第一空填名词做动词词组的宾语。第二空根据时间状语可知是现在进行时态，故填现在分词形式。故选C。