Don’t be too hard David; he is only five years old.A. onB. toC. aboutD. with

问题补充：

Don’t be too hard David; he is only five years old.

A. on

B. to

C. about

D. with

答案：

(答案→)A. on

B. to

C. about

D. with

解析：考查介词。句中考查短语be hard on sb对某人苛刻。句意：不要对戴维太苛刻了，他只有5岁大。