—How did you find him out?—I his name by chance on the list.A. came downB. came aboutC. c

问题补充：

—How did you find him out?

—I his name by chance on the list.

A. came down

B. came about

C. came up

D. came across

答案：

A. came down

B. came about

C. came up

D. came across

解析：come across意为“偶然遇到；碰巧遇见”。