CÁC BẠN GIẢI THÍCH TẠI SAO HỘ MÌNH VS Ạ Becoming a collector of something is very interesting. The most interesting is ________(26) stamps because there are so many to choose from. Stamps-collecting _______(27) a hobby of millions of people all over the world for more than some hundred years. Nobody______(28) how many stamps there are in the world. The _____(29) problem of all beginner is just which stamps to collect, as there are so many and nobody could collect them all. Many people collect stamps of one country, perhaps the one they live _____(30) or small group of countries, or a theme. “Thematic collection “ means gather all stamps in connnection with an idea. 26. A. collect B. collection C. collects D. collecting 27. A. is being B. has been C. was D. is 28. A. have known B. are knowing C. knows D. know 29. A.big B. bigger C. most big D. biggest 30. A. in B.of C. on D.at