Becoming a collector of something is very interesting. The most interesting is_______(36) stamps because there are so many to choose from. Stamps - collecting _______(37) a hobby of millions of people all over the world for more than some hundred years. Nobody_______(38) how many stamps there are in the world. The _______(39) problem of all for the 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_______(40) or small group of countries, or a theme. "Thematic collection" means gather all stamps in connection with an idea. 36. A. collect B. collection C. collects D. collecting 37. A. is being B. has been C. was D. is 38. A. have known B. are knowing C. knows D. know 39. A. big B. bigger C. most big D. biggest 40. A. in B. of C. on D. at ai giúp em vơi dạ.,tìm ddáp án thì môt nơi một đáp án khng biết cái nào dúng