ER là cách đọc mở rộng và không khó để hiểu những điều quan trọng without teacher's help in a stress-free environment, usually done outside the classroom
ER is extending and not hard to understand the important things without teacher's help in a stress-free environment, usually done outside the classroom
ER is reading is not difficult to expand and understand the important things without teacher's help in a stress-free environment, done outside the classroom Thường