适合油性药液的抗氧剂有( )。

A．焦亚硫酸钠

B．亚硫酸氢钠

C．亚硫酸钠

D．硫代硫酸钠

E．BHA

He is always working______he can.

A．as hardly as
B．as hard as
C．so hardly as
D．so hard as