IV. There is ONE mistake in each sentence. Underline and correct it
17. Where did Nam went yesterday? ___________________
18. What channel is it in today? ___________________
19. Ann often does chess after school. ___________________
20. Don’t running in this library, please! ___________________
18 IT
19 Does ( vì does là làm không thể là làm cờ vua được )
20 Running ( vì phía là don’t nên đây phải là thì HTĐ )