— How can you finish the work on time?
— .
A. By working with friends
B. By working for friends
C. To ask the teachers
D. To read a lot of books
网友回答
(答案→)A. By working with friends
B. By working for friends
C. To ask the teachers
D. To read a lot of books
解析：by 表示通过某种方式.上文意思是你怎样按时完成这项工作的?选项A和朋友一起做,最符合题意.