—I prefer speaking to listening in English learning.

—Oh, really! I think you should be good at _____of them.

A．both

B．neither

C．some

D．all

白肋烟调制时．蛋白质的降低．（）降低速度快。

A．第1—5天

B．第5--10天

C．第8～12天

D．第12--15天