—Why, my new puter is rubbish! Five hours has passed and it still hasn’t finished the downloading.
—Don’t worry. You know, sometimes the Internet be very slow.
A. can
B. may
C. should
D. must
网友回答
(答案→)A. can
B. may
C. should
D. must
解析：考察情态动词。Can考察；表示可能性。结合句意可知A正确。句意：—为什么？我的新电脑真是垃圾。四个小时过去了还是没有下载完。—别担心。你知道的，有时候网络也可能很慢。