We should try our best English well.A. learnB. to learnC. learntD. to learning

问题补充：

We should try our best English well.

A. learn

B. to learn

C. learnt

D. to learning

答案：

A. learn

(答案→)B. to learn

C. learnt

D. to learning

解析：句意：我们应该尽最大努力学好英语。try one’s best to do sth意为“某人尽全力做某事”；动词不定式做目的状语；故选B。