— How do you study for a test?—working with friends.A. ByB. WithC. OnD. In

问题补充：

— How do you study for a test?

—working with friends.

A. By

B. With

C. On

D. In

答案：

(答案→)A. By

B. With

C. On

D. In

解析：本题根据问句内容，而回答用do sth by doing，故选答案为A