Found:

I found a schoolbag. Some books and a pencil box are in it. Please call Paul at 836﹣1297.

Lost:

I lost my MP5 player in our school library. It's black. I must find it. My name is Jenny. My phone number is 235﹣6758. Please call me if （如果） you find it. Thank you！

Found:

I found a set of keys at the school gate （大门）. Are they yours? Please call Gina at 126﹣3568, or e﹣mail me at gina258@126.com.

Lost：

I lost a dictionary. It's red. Please call Frank at 256﹣1872.Thank you very much.