=>
29. Unless he tries more, all the family members will not feel happy.
-> unless ~ if not
30. Many people in my city were fined for not wearing masks in public by the police.
-> bị động QKĐ was/were V3/ed
31. Classroom activities are not as interesting as outdoor activities.
-> so sánh bằng as adj as
32. She has studied Japanese for six months.
-> thì HTHT, S have/has V3/ed, for + khoảng thời gian
33. The footballer who is living in Can Tho City has scored many goals for his team.
-> who (đtqh chỉ người)
34. The pandemic is breaking out, so we should not go on vacation this summer.
-> so : vì vậy, vậy nên