5. I am proud of my sister because she always studies well. (dùng HTD vì có always)

6. Yesterday my teacher said that I worked harder to improve my English pronunciation. (dùng QKD vì có yesterday)

7. You have English lessons three times a week. (3 lần 1 tuần -> lesson thêm s)

8. Ba received the report ago (dùng QKD vì có ago)

5. We raise funds by collecting waste paper and broken glass. (broken glass: kính vỡ)

6. We are going to clean up lakes banks this weekend (dùng HTTD vì có this weekend)

5.I am proud of my sister because she always studies well 

6.Yesterday my teacher said that I worked harder improve my ENglish pronunciation

7.you have english three times a week.

8.Ba received the report (cái này hình như phải có 1 khoảng thời gian) ago

6.We are going to clean up lakes'banks this weekend