根据首字母,完成短文

题目

根据首字母,完成短文
It's clear to see,nowadays,lots of birds are in danger.Birds are human's good farmers,they can plant trees from pests.If we don't realize how important it is,our e______will be very bad.That is the reaon w___birds must be protected.In spite of this,many people still kill birds for fun.Wa have to stop it.I believe,when p_____stop doing this,and begin to protect birds and theirs ,human will also have a b___life.

答案

1、environment
2、why
3、people
4、better