—When were you born?—I was born April 23 1979.A. onB. inC. atD. to

问题补充：

—When were you born?

—I was born April 23, 1979.

A. on

B. in

C. at

D. to

答案：

(答案→)A. on

B. in

C. at

D. to

解析：在表示时间时，at表示在时间的一点；on 表示在具体某一天； in表示在一个时间范围，或者接一段时间，表示多久之后。to表示差几分到几点。本句中April 23, 1979.为具体某一天,故用介词on,选A.