4. Why don't we go swimming?

=> What about going swimming? (sau what about+Ving)

5. The birthday cake is very delicious

=> What a delicious cake (cấu trúc câu cảm thán: What+a/số lượng+tính từ+danh từ)

6. When is her birthday? 

=>What is the date of her birth?

7. Nam works more hours than Lan

=> Lan works fewer hours than Nam (cấu trúc so sánh thua của tính từ ngắn: S+V+"er"+than+..)

8. Nile river is longer than any rivers in the world

=> Nile river is the longest river in the world (so sánh hơn nhất của tính từ ngắn: S+V+the+"est"+....)

9. The school library has over five thousand books

=>There are over five thousand books in the school library (There are+số lượng+N+...)

10. Ha Noi has many interesting places 

=> There are many interesting places in Ha Noi (gthich giống câu 9)

11. I have fewer toys than my younger sister

=> My younger sister has more toys than me (so sánh hơn)

12. Lam has ten days off for his summer vacation

=> Lam has a ten-day summer vacation (dùng "a" khi có dấu gạch ngang (cái này mình kh biết gthich sao nữa))

13. I often walk from home to school in ten minutes
=> It takes me 10 minutes to walk from home to school (cấu trúc với take: It takes/ took (sb) + time + to V)

14. It takes me about 2 hours each day to do my homework

=> I spend 2 hours each day doing my homework (cấu trúc spend+time+Ving)

15. Do you enjoy listening to music?

=> Are you interested in listening to music? (interested in gần đồng nghĩa với enjoy, cấu trúc interested in+Ving)

16. Mai drinks more milk than her brother

=> Mai's brother drinks fewer milk than her (so sánh thua)

17. The blue dress is cheaper than the red one

=> The red dress is more expensive than the blue one (so sánh hơn của tính từ dài: N+verb +more+adj+than+...)

18. Reading is more boring than watching TV 

=> watching TV is more interested than reading (gthich giống câu 17)