No matter how late she comes home she makes a routine to walk her dog for about an hour

问题补充：

No matter how late she comes home, she makes a routine to walk her dog for about an hour.

A. it

B. this

C. that

D. her

答案：

(答案→)A. it

B. this

C. that

D. her

解析：A 在动词make后面，it作为形式宾语，不定式才是真正的宾语。句意：无论回家多晚，她总是习惯地遛一小时的狗。