单项选择题

______ I admit that the problems are difficult, I don't agree that they cannot be solved.

A. When
B. Where
C. While
D. Why
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单项选择题
A study shows that students living in non-smoking dorms are less likely to ______ the habit of smoking.
A. make up
B. draw up
C. turn up
D. pick up
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
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