Hide and seek is a (36) __________game that has been played for a long time. You can play it indoors or outdoors but the basic rules (37) __________the same. In this game, at least two players hide (38) __________ and one player, or "(39)__________", will find them. This game is quite (40)__________around the world and can be played by children or adults. Câu 36. A. children B. child C. children's D. child's Câu 37. A. often are B. are often C. are not often D. are often not Câu 38. A. themselves B. theirs C. them D. their Câu 39. A. finder B. hider C. looker D. seeker Câu 40. A. common B. popular C. usual D. important