In face of failure for the moment it’s the most important toa good state of mind.A. keep

问题补充：

In face of failure for the moment ,it’s the most important toa good state of mind.

A. keep on

B. keep at

C. keep up

D. keep out

答案：

A. keep on

B. keep at

(答案→)C. keep up

D. keep out

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