每一个中国人都应该记住四月十五日是国家安全日．
Every Chinese should that the Security Day is on April 15th．
In my hometown， there was a big old tree （在……对面） the school．
You'll be （惩罚） if you break the traffic rules．
Would you mind （分享） your ideas？
Certainly not．
We depend on nature to live， so it is necessary for us to protect it （明智地，充满智慧地）．
Don't tell the secret to a third person． Just keep it to （我们自己）．
Trust me， please．