It's raining ____,we have to stay at home instead of going fishing.

问题描述:

It's raining ____,we have to stay at home instead of going fishing.
A.badly B.hardly C.heavily D.beautifully

C.
从句中意思理解可以排除D(美丽地).而雨下得大只能说rain heavily或rain hard(而不能用hardly,因为hardly是“几乎不”的意思),故选C