`I.`
`1.` C
`2.` A
`3.` A
`4.` D
`5.` D
`II.`
`1.` D
`2.` C
`3.` C
`4.` D
`5.` B
`6.` C
`7.` C
`8.` B
`9.` C
`10.` A
`11.` B
`12.` D (Ta dùng thì HTĐ khi muốn nói về một lịch trình, thời gian biểu)
`13.` B
`14.` C
`15.` A
`16.` C
`17.` C
`18.` B
`19.` B
`20.` B
`III.`
`1.` D does she go `->` she went
`2.` B saying `->` to say
`3.` A will have `->` will be having
`4.` D yesterday `->` the day before/the previous day
`5.` D impolluted `->` unpolluted
`IV.`
`1.` Coffee is more expensive than tea.
`2.` I enjoy listening to music every day.
`3.` Mai is the most intelligent person in my group.
`4.` It is five years since I last returned my village.
`5.` If she didn't go out in the rain, she wouldn't get wet.
@ `Ly`