—You'd better () work too hard like this.
—I see. You mean () too hard makes one tired and ill.

A．not; work

B．don't; working

C．don't; to work

D．not; working

在分税制中，主要采用按照税源实行分率分征办法的国家有( )。

A．中国
B．美国
C．伊朗
D．巴西