妈妈，请相信我（mom，please trust me again）
     before i made those silly mistakes, mother trusted me all the time.she regarded me as an honest kid. but i could never own her trust any more. how i regretted having lied to her! here was one of the stupid mistakes i've made. i failed in a math exam, but i lied to mother that i got a good mark. she believed me at first, but several days later she got the truth from my teacher's mouth. i made several similar mistakes since then. mother told me that it doesn't matter to make mistakes, but it is really