It’s necessary _____ the dog’s fur and play with it for _______.

A．brushing, sometimes

B．to brush, sometime

C．brushing, sometimes

D．to brush, some time

黄龙汤的功用是（）

A.泻热通便，滋阴益气

B.攻下通便，补气养血

C.润肠泻热，行气通便

D.温肾益精，润肠通便

E.清热泻火，凉血解毒