适用于生产经营规模较小、产品零星、会计核算不健全的小型作坊，能够控制原材料或进销货的纳税人的税款征收方式是（）。

A.查账征收

B.查定征收

C.查验征收

D.代收代缴

He is the only one of the people here who ____ how to operate the computer.

A．knows

B．know

C．had known

D．known