—Look! How long like this?
—More than 20 days! It’s usual here that rain pours without stopping in May.
A. did it rain
B. is it raining
C. has it been raining
D. doesn’t rain
网友回答
A. did it rain
B. is it raining
(答案→)C. has it been raining
D. doesn’t rain
解析：考察时态。句意：—像这样下雨多久了？—超过20天了。在5月份在这里不停地下雨是很正常的事情。根据句意可知说明的是从过去某个时间所发生的事情一直持续到现在，而且还在发生，故使用现在完成进行时的时态。故C正确。