Điền từ thích hợp vào chỗ trống

27. The distance from Ho Chi Minh city to Phu Quoc Island is about 300 km. It is 

    28. Road users should obey traffic rules strictly. Traffic rules 

    29. Be careful or you’ll hurt yourself. If you are 

    30. He didn’t return to his native village until the war ended. It was not until 

    31. All of them laughed when I told the joke.The joke 

    32. Her career as an actress began ten years ago.- She

    33. He is too young to appreciate such a film.- He’s not 

    34. The film started before we got to the cinema.- By the time

    35. The cinema was such a long way from the city center that no one went there.- The cinema was 

    36. I picked up the vase carefully so as not to break it. ( wouldn’t )

    37. We put up a fence to prevent the rabbit escaping. ( couldn’t) 

    38. Jane gave up smoking because she wanted to save money. (so as ) 

    39. I whispered so that I wouldn’t disturb anyone. ( avoid