You have to finish all the cleaning by yourself, ______? [ ]

A. haven't you

B. can't you

C. have you

D. don't you

制式步枪按用途分为（）、骑枪（卡宾枪）、突击步枪和狙击步枪。

A.特种步枪

B.冲锋步枪

C.普通步枪

D.自动步枪