In face of failure we should keep up good state of mind instead of being depressed.A. 不填

问题补充：

In face of failure, we should keep up good state of mind instead of being depressed.

A. 不填; a

B. a, the;

C. the; a

D. 不填; the

答案：

(答案→)A. 不填; a

B. a, the;

C. the; a

D. 不填; the

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