your spirits. Try again and you’ll succeed.A. Catch upB. Catch onC. Keep upD. Keep

问题补充：

your spirits. Try again and you’ll succeed.

A. Catch up

B. Catch on

C. Keep up

D. Keep

答案：

A. Catch up

B. Catch on

(答案→)C. Keep up

D. Keep

解析：Keepup your spirits!意思是：振作起来！打起精神！