－When was David born?－He was bornJune 12 1989.A. at B. inC. onD. for

问题补充：

－When was David born?

－He was bornJune 12，1989.

A. at

B. in

C. on

D. for

答案：

A. at

B. in

(答案→)C. on

D. for

解析：考查介词的用法，在具体日期前用介词on。