In ancient times, dogs were mainly ______helping people hunt( 打猎) .Now they are more useful-they can help the blinds, search for the bad eggs.

A．bad for

B．used to

C．used for

D．good at

明代本草代表作是()

A．《图经本草》

B．《新修本草》

C．《本经》

D．《本草纲目》

E．《本草纲目拾遗》