We must go there ___ the piano.

问题描述:

We must go there ___ the piano.
A.to learn B.learn C.learned D.will learn

A.to learn whygo someplace to do sth;去某地做某事前面有动词go,后面动词只能加to,或+ing.B.learn 是原形,排除 C.learned 是过去式,排除D.will learn是将来时,排除所以只有A是正解.