68. "Did you have a good sleep last night?" David asked Jim.

　　David asked Jim _____ he _____ well last night.

67. Mrs.Smith is busy now. She is doing her housework at home.

　　Mrs.Smith is _____ _____ her housework at home.

66. Jack is the tallest boy in our class.

　　Jack is taller than _____ other _____ in our class.

65. - Sally, your dress looks so nice! - Thank you. It _______ (make) of silk.

64. The summer holidays are coming. I ______ (fly) to Hainan Island with my parents.

63. - Do you like listening to popular songs?

　　- Sure. My family ______ (be) all music lovers (爱好者).

62. - I'm too tired.

　　- So am I. We'd better stop ______ (walk) and have a rest.

61. Where is Mr.White? I haven't seen him for a few days.

　　He ______ (go) to Hong Kong.

60. He likes collecting all kinds of information. I often see him ______ (search) the Internet.

59. Our geography teacher once told us that the earth _______ (go) around the sun.