50. With everything he needed ________, he hurried home quickly.

　 A. to buy　　 　　　　　 B. buying　　 　　　　　 C. bought　 　　　　　 D. to be bought

49. The party was successful, but we thought it a pity not ________ you.

　 A. invite　　 　　　　　　 B. to invite　 　　　　　 C. inviting　　 　　　　 D. to have invited

48. - Do you have anything ________, sir?

- No, thank you.

A. to type　　 　　　　　 B. typing　　 　　　　　 C. to be typed　　 　 D. type

47. He is not the person ________ in time of trouble.

　 A. to believe　 　　　　 B. to depend　 　　　　 C. to depend on 　　　 D. to trust in

46. Mr. Smith has received a letter, ________ to give a lecture in Princeton Institute.

　 A. being invited 　　　 B. to be invited 　　　 C. inviting him 　　　　 D. invited

45. He went to the USA before liberation, ________ a large property to his daughter.

　 A. leaving　 　　　　　　 B. giving 　　　　　　　　 C. offering　 　　　　 D. left

44. In the reading room we found her ________ at a desk with her attention ________ on a book.

　 A. sitting; fixing　 　　 B. sit; fixed 　　　　　　 C. seated; be fixed 　 D. seated; fixed

43. - They sat still in the room, ________.

　 　- Why did they do like that?

　 A. drawing the curtain　 　　　　　　　　　　　 B. with the curtain drawn

　 C. with the curtain drawing　　 　　　　　　　 D. having the curtain drawn

42. Does the way you thought of _____ the water clean make any sense?

A. making 　　　　　　　 B. to make 　　　　　　 C. how to make 　　　 D. having made

41. --- Why was he fined?

　 --- He happened to _____ several flowers in the park.

A. be seen pick 　　　 B. be seen picking 　 C. be caught to pick D. catch pick