根据中文意思及句意，写山相应的单词。

1．How many colours are there in a _________ (彩虹)?

2．I'm busy these days, I haven't __________ (答复) to Jim's last e-mail.

3．colours Can change our __________ (心情).

4．Mr. Smith is 60 years old. But he is still _________ (精力充沛的).

5．Animals in forests are busy getting ready for the _________ (即将到来的) winter.