37. It is necessary for all local residents to stay in as much as possible during the social distancing (cấu trúc: it is+adj+for sb+to V)
38. Da Nang is the most attractive city in Viet Nam (so sánh nhất với tính từ dài: the most+adj)
39. The man who gave the charity considerable money is generous (mệnh đề quan hệ với who)
40. Lan's brother told her if she wanted to pass the exam, she should follow his instruction
