your courage you will not fail.A. Keep to…thenB. Keep up…andC. Keep up with…andD. Keep

问题补充：

your courage, you will not fail.

A. Keep to…then

B. Keep up…and

C. Keep up with…and

D. Keep on…so

答案：

A. Keep to…then

(答案→)B. Keep up…and

C. Keep up with…and

D. Keep on…so

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