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。
I watched T V all the day ,so I am b___
You’d better to keep your v______________ down when talking in public.
Mary is so smart that she can answer these questions ______________ (快速地) .
Both of my best friends were born in ______________ (十二月) .
The robots  help us  to do the ______________(家务) in the future.