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【单选题】

This computer doesn’t work properly, because a certain virus has ____ the operating
system.
[ ]

A.
broken up
B.
broken down
C.
broken out
D.
broken away
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参考答案:
参考解析:
.
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举一反三

【单选题】his contribution to botany, Joseph Banks had a flower _______him.

A.
As a reward for; named after
B.
As a reward; named
C.
As a reward for; name after
D.
Reward for; take its name from