Điền một từ để hoàn thành đoạn văn:
Trung is 13 years old and he is a .......... at Nguyen Duy school. He learns different .............. at school. At 9. 00 every day, all students have a ............... of twenty fifteen minutes. Most of them go into the .......... at recess.They take part ....... many activities. Trung often ........... marbles with his friends, sometimes they play blindman' s bluff or catch. The girl usually ................... rope. But talking is the most ................... activity at recess. After fifteen minutes at recess, all students are very happy.