Mai and Thao often do aerobics in …………. free time. A. they B. them C. theirs D. their 17. Road signs are very ………………. They tell us what we must do. A. useful B. dangerous C. good D. difficult 18. There are ………………. stars in the sky at night. A. is million B. are millions of C. has million D. are million 19. Mary’s father’s mother and father is her ………………. A. grandfather B. grandparents C. grandmother D. uncles 20. There isn’t any water in the bottle. I am going to get ………A. many B. aC. any D. some 21. Washington D.C is ………capital of ………. United States.A., theB. the, C. the, theD. ,  22. Linda: “Do you live in the country or in the city?” ~ Daisy: “………………….” A. Yes, I do B. I live in the city C. No, I don’t D. I live on the city 23. Which is …………………., London or Tokyo? A. the biggest B. bigger C. bigger than D. the big 24. Tom: “………………………………….”~ Jake: “She is kind.” A. What does your teacher like? B. What would your teacher like? C. What does your teacher look like D. What is your teacher like? 25. On the table are vegetables, bread and two large................................ A. bowl of soup B. bowl of soups C. bowls of soups D. bowls of soup