根据句意，在标有题号的横线上写出括号内所给单词的适当形式。
Many animals are _____________ (active) in winter and they usually sleep.
I can offer you £50, but I can’t go any _____________ (far)than that.
When you feel tired, you’d better wear ___________ (energy) colours, such as green.
“It’s not good to keep your worries to_____________(you).” the teacher said to one of the children.