——Is this your ruler? ——No it’s A. hisB. herC. mineD. your

问题补充：

——Is this your ruler? ——No, it’s

A. his

B. her

C. mine

D. your

答案：

(答案→)A. his

B. her

C. mine

D. your

解析：本题的回答语的含义是它是某人的尺子，应该用名词性物主代词，his为名词性物主代词，故本题选A。