84．My mother told me the light_______ (travel) much faster than sound．

83．You_______ (get) well if you take the medicine．

82．There_______ (not be) an important talk on science next Monday．

81．While the Reads_______ (have) supper, the bell rang．

　　 We live in the“computer age”．People like scientists，writers，teachers and even students use computers to do　 41　 work．But more than 30 years ago，　 42　 couldn’t do much．They were very big and expensive．Very　 43　 people were interested in them and knew how to use them．Today computers are smaller and　 44　 ．　 45　 they Can do a lot of work，many people like to use them．Some people even have them at home．

　 Computers become very important because they Can work　 46　 than men and make fewer　 mistakes．Computers Can　 47　 people do a lot of work。Writers now use computers to write．Teachers use them to study and children use them to play games．Computers can also remember what you put　 48　 them．Computers are very　 49　 and helpful．They are our good friends．

　 Do you want to　 50　 a computer?

41．(　　 )A．many of　　 B．all kinds of　　 　　　 C．a lot D．very much

42．(　　 )A．scientists　　 　　　 B．teachers　　 　　 C．students 　 D．computers

43．(　　 )A．few　　 　　　　　　　 B．little　　 　　　　　 C．a few 　　　 D．a little

44．(　　 )A．cheap　　 　　 B．cheaper　　 　　　　　　 C．expensive 　　　 D．more expensive

45．(　　 )A．But　　 　　　　 B．And　　 　　　　　 C．Since 　　　 D．If

46．(　　 )A．slow　　 　　　　　　 B．slower　　 　　　　　　 C．fast D．faster

47．(　　 )A．help　　 　　　　　　　 B．make　　 　　　　 C．use 　 D．stop

48．(　　 )A．in　　 　　　　　 B．into　　 　　　　　 C．on 　　　　　 D．up

49．(　　 )A．beautiful　　 B．careful　　 　　　　　　 C．useful 　　 D．heavy

50．(　　 )A．pay　　 　　　　 B．sell　　 　　　　　 C．lend D．have