单项选择题

A safety analysis（）the target as a potential danger. Unfortunately, it was never done.

A. would identify
B. will identify
C. would have identified
D. will have identified

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单项选择题
John D. Rockefeller,（），owned 90 percent of all American oil refineries.

A. as still a young man
B. while still a young man
C. a young man however
D. in spite of a young man
单项选择题
It is said that with more forests（）huge quantities of good earth are being washed away.

A. being destroyed
B. destroyed
C. destroying
D. to destroy
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