单项选择题

Scientists can predict regions ______ new species are most likely to be found.

A. where
B. when
C. why
D. how
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单项选择题
If you want to start a business, it is essential for you to raise considerable ______.
A. capital
B. investments
C. savings
D. income
单项选择题
I had the very pleasure of ______ with your husband in the meeting last week.
A. knowledge
B. identification
C. acquaintance
D. recognition
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