We all know that different people have different hobbies. Some like planting flowers, some like exercising and others like building model ships. I am Jack and I like collecting stamps. There are four people in my family and they are my parents, my brother and I. My father works in a big company. He usually goes abroad three or four times a year. Two years ago when he was working abroad, he sent home a letter with a beautiful stamp on the envelope. The stamp was very beautiful and I like it very much. Since then, when my father goes abroad, I always ask him to send me different stamps from different countries. My brother went to college last year and he often wrote me letters instead of chatting with me or sending e-mail to me, so that I could see the beautiful stamps on the envelopes and I always took them down and put them in my box. Now I have more than a thousand stamps. From these stamps I can learn a lot of knowledge like the history persons. Whenever I look through the beautiful stamps, I will feel relaxed and happy. They are like my "good and nice friends." Jack has been collecting stamps   _  .
since last year for about two years since three months ago for about three years