Keep up a good state of mind even if you fail plenty of times.A. shouldB. willC. mustD. n

问题补充：

Keep up a good state of mind even if you fail plenty of times.

A. should

B. will

C. must

D. need

答案：

(答案→)A. should

B. will

C. must

D. need

解析：句意：即使你可能会失败很多次，你也要保持一个积极的思想状态。Should:可能 will:将要 must:一定，必须 need：需要。根据句意选A。