43.--- Why did you go back upstairs?

　 --- I thought I had left　 the window______.

　 A. open　　 B. opened　　　 C. being opened　 　D. to be opened

42. When _____that it was getting late, I put out the light and went to bed.

　 A. find　　　　　 B. finding　　　 C. found　　　 　　D. found

41. While I was walking to school yesterday morning , I met a friend of mine._____to school yesterday morning, I met a friend of mine.

　A. I was walking　 B. walked　 　C. While I walking　　 D. walking

40. When only a small boy, _______.

　 A. my father took me with him to France　

B. I went with my father to France

　 C. my father went with me to father　

D. my father took me to France

39. Though I live in the city, I have few visitors.

= ______in the city, I have few visitors

　 A. I live　　　 B. Having lived　 C. Living　　 　D. Being lived

38. If _____green, the doctor might look more beautiful.

　 A. paint　　　 B. painted　　　 C. painting　　　 　D. to paint

37. _____entering the hall, he found everyone waiting for him.

　 A. At　　　　 B. While　　 　　D. On　　　　　　　 D. In

36. They had finished their work , so they went home .=______, they went home.

　 A. Work done　　　　　　　　　　 B. They finished their work　

C. work to be done　　　　　　　　 D. Work having done

35. Time_____, I’ll go on a picnic with you this Sunday .

　 A. permit　　 B. to permit　　 C. permitted　 　　D. permitting

34. The lesson _____over, they went out of the room.

　 A. be　　 　B. been　　　　　 C. was　　　　　　 D. being