III
21. B bad -> badly ( sau động từ "play" cần trạng từ )
22. D listen to -> listening to ( prefer + Ving + to + Ving )
23. D in here -> here
24. C skillfully -> skillfull ( cần tính từ )
25. C for -> to ( add + ST to + ST: thêm cá gì vào cái gì )
IV
26. D All are correct
27. D we spent two hours repairing the computer. ( S + spent + time + Ving )
28. C My brother plays soccer very well.
29. A Chi prefers pop music to classical music. ( prefer + N + to + N )
30. B How about seeing a detective movie ? ( How about + Ving )
