根据句意和首字母或汉语提示，将单词的正确形式写在题中相应的横线上。

小题1: There’s nothing in this box. Look, it’s e______________.

小题2:You’d better to keep your v______________ down when talking in public.

小题3:Jack is so smart that he can answer these questions ______________ (容易地) .

小题4: Both of my best friends were born in ______________ (十月) .

小题5:People will use robots to do the ______________ (家务) in the future.

肉制品之冷藏、冷冻之目的（）。

A.促进微生物生长

B.促进发色

C.抑制微生物生长

D.加速腐败