—When is your father going to Hong Kong?—He is going thereJuly 28th.A. on B. atC. inD. t

问题补充：

—When is your father going to Hong Kong?

—He is going thereJuly 28th.

A. on

B. at

C. in

D. to

答案：

(答案→)A. on

B. at

C. in

D. to

解析：在具体的某一天用on。