81. They drifted about and were not seen until twelve hours later.

80. Soon they got into trouble because of the thick fog.

79. About sailing, Brett knew a little.

　　　　 根据对话内容，在每小题的空白处填人适当的话语，使对话意思完整。

Samuel：Chen Li，can I have a look at your copy of China Daily?　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

Chen Li：_________________________________________________(73).

Samuel：I want to have a look at what’s on this weekend. Let me see　 now.

Chen Li：Is there anything good on?

Samuel："Purple Rain Storm" is giving a performance at the People’s Theatre..

_______________________________________________________(74)？

Chen Li：They're a pop group formed by three girls. They're said to be very good.

　　　　 _____________________________________________(75)？

Samuel：7：30 pm._______________________________________. (76)？

Chen Li：Yes，I'll be free. I'd like to go.

Samuel：______________________________________________(77)．

I’11 meet you at the theatre at 7：15.

Chen Li：Good！See you then. Bye.

72.假如每个人都为保护环境做出自己的贡献，这个世界将变得更加美丽。

　　 The world will become much more beautiful if everyone_________________

　　　 a contribution to___________________________ the environment.

71.轮到你在会上发言了。

　　 It’s __________、_________to speak in the meeting.

70.我叔叔以前是个司机，而现在他是工程师。

　　 My uncle________、__________ be a driver, but now he is an engineer.

69．查一下你们是否都有飞机票。

　　 _______________、_____________ you've got the air tickets.

　 根据所给中文意思完成句子，每空只填一个词。

68.董先生无论什么时候睡觉，总也睡不够。

　　 Mr Dong doesn't get enough sleep _______he________ to bed.