单选题
The new computer virus ______, the system was restored to its normal operation.
A、
having removed
B、
being removed
C、
had been removed
D、
was removed
【正确答案】
B
【答案解析】
the new computer virus being；removed在句子中是独立主格结构用被动态表示，因此B项为正确答案。
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