Knowledge and learning are important if we want to be successful but they may also our t

问题补充：

Knowledge and learning are important if we want to be successful, but they may also our thinking.

A. direct

B. limit

C. change

D. improve

答案：

A. direct

(答案→)B. limit

C. change

D. improve

解析：动词辨析。Direct管理，指挥 limit限制 change 改变 improve提高

句意为，知识和学习都很重要，如果我们想要成功，但是他们也可能限制我们的思考。