单项选择题

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

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单项选择题
The director was critical （）the way we were doing the work.

A. at
B. in
C. of
D. with
单项选择题
（）,the guest spealer was ushered into the auditorium hall to give the lecture

A.Being shown around the campus
B.Having shown to the campus
C.After been shown around thecampus
D.Having been shown around the campus
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