根据单词所给的首字母填写,完成句子.

问题描述:

根据单词所给的首字母填写,完成句子.
1.It's raining outside.Take an u_____with you.
2.Before you post the letter,put a s_____on the envelope.
3.There are many f_____and trees in the park.It's very beautiful.
4.Do more e_____and you will get stronger.
5.Tomorrow is the 24th of December .Let's buy a C_____tree.

umbrella 雨伞
stamp邮票
flowers 花
exercise 锻炼
Christmas 圣诞