单项选择题

To succeed in a scien:tific experiment, ______.

A. one needs being patient person
B. patience is to need
C. one needs to be patient
D. patience is what needed
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单项选择题
How can you______her offer I'm afraid she will feel hurt.
A. turn out
B. turn up
C. turn down
D. turn away
单项选择题
By no means______our mistakes.
A. we ought ignore
B. we ought to ignore
C. ought we ignore
D. ought we to ignore
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