1. Lan's family often goes to Vung Tau for their summer vacation (câu: In the summer holidays, Mr. Hung, Mrs. Lan, and their children often go to Vung Tau for two or three days.)
2. two or three days (câu: In the summer holidays, Mr. Hung, Mrs. Lan, and their children often go to Vung Tau for two or three days.)
3. they went to Nha Trang. (câu: Last summer they went to Nha Trang.)
4. In the morning, Ba played soccer with his father on the beach. Lan and her mother walked along the beach and built sandcastles. (trích từ bài )
5. yes, they are( câu: They visited Tri Nguyen Aquarium.)
VI:
1. what a expensive car(what a + adj +N)
2. my brother has gone to Ho Chi Minh city since 2012(dấu hiệu : since)(thì hiện tại hoàn thành)
3. if you work hard , you will pass the exam . (câu điều kiện loại 1 )(cấu trúc:If +S+ V(thì hiện tại đơn),S+ will + V(động từ nguyên mẫu)
4. In the year 2030, robots will be able to do all of housework instead of us.(thì tương lai )(dấu hiệu : 2030 ở tương lai :D )