问题

The computer system _______suddenly while he was searching for information on the Internet.

A:broke out
B:broke up
C:broke in
D:broke down

正确答案是：

同类题型

下列选项中，不含通假字的一项是

下列词语，解释全都正确的一项是(　　)

Mary_______ my letter, otherwise she would have gone to the concert.

With so many thingsmixed up it’s hard to _______ what’s what

____ he was, he tried his best tohelp you.