问题
选择题
29. The computer system _______ suddenly while he was searching for information on the Internet.
A．broke down
B．broke out
C．broke up
D．broke in
答案
答案：A
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29. The computer system _______ suddenly while he was searching for information on the Internet.
A．broke down
B．broke out
C．broke up
D．broke in
答案：A