We hadn't planned to meet.We met chance.A. ofB. inC. forD. by

问题补充：

We hadn planned to meet.We met chance.

A. of

B. in

C. for

D. by

答案：

A. of

B. in

C. for

(答案→)D. by

解析：by chance为固定搭配，意为“偶然”。