How do you study a test? I study working with friends.A. for ; forB. for ; byC. by ; forD.

问题补充：

How do you study a test? I study working with friends.

A. for ; for

B. for ; by

C. by ; for

D. by ; by

答案：

A. for ; for

(答案→)B. for ; by

C. by ; for

D. by ; by

解析：句意：你是怎样为考试而学习的？我通过和朋友合作而学习。for表示目的，“为了……”之意；by表示方式、方法，“通过……方式”之意。故选B。