53.John knocked at the door for nearly five minutes____his wife opened it.

　　A.when 　　B.before 　　C.until 　　D.as [仿04天津卷--32]

　　54.---The thread of my kite broke and it flew away. [仿04四川卷--23]

　　---I told you it would easily break_____was the weakest.

　　A.where 　　B.the place where 　　C.for it 　　D.where it

　　55.They were surprised that a child could work out the problem____they themselves couldn't.

　　A.once 　　B.while 　　C.then 　　D.if [仿04NMET(III)--35]

　　56.I had been puzzled over the problem for over an hour without any result, _____ all at once thesolution flashed across my mind. [仿04上海卷--38]

　　A.while 　　B.when 　　C.then 　　D.as

　　57.Sally worked late in the evening to finish her report _____ her boss could read it first thing next morning. [仿04NMET(I)--25]

　　A.because 　　B.so that 　　C.before 　　D.or else

　　58._____much advice I gave him, he did exactly what he wanted to do. [仿04湖北卷--27]

　　A.How 　　B.However 　　C.Whatever 　　D.No matter

　　59.Generally speaking, _____ according to the derections , the drug has no side effect. [仿04湖北卷--28]

　　A.when to take 　　B.when taking 　　C.when to be taken 　　D.when taken

　　60.Someone called me up in the middle of the night, but they hung up _____ I could answer the phone. [仿04福建卷--31]

　　A.before 　　　B.as 　　　　　C.since 　　　　D.until

　　61.--- May I go and play with Tom this afternoon, Mum?

　　---No. You can't go out _____ your homework is being done. [仿04天津卷--32]

　　A.until 　　　　B.since 　　　　C.before 　　　　D.if

　　62.The idea of fish being able to produce electricity strong enough to light a lamp is almost unbelievable, _____ several kinds of fish are really able to do this. [仿04NMET(III)--30]

　　A.therefore 　　B.and 　　　　C.then 　　　　D.but

　　63.Is it true ______ the rain stops , it will be as hot as in the summer here? [仿03NMET--21]

　　A.when 　　　　B.that when 　　　　C.whenever 　　　　D.that

　　64.---_____ I watch TV, I'll turn it down and never make any noise.

　　--- Good. ______ you are doing should never disturb others. _______ how important you are,never forget about how others feel. [仿2003上海卷--42]

　　A.Whatever; Whenever; No matter 　B.Whenever; Whatever; No matter

　　C.Whether; Whatever; 不填 　　　　D.No matter; Whenever; 不填

　　65. ______ they live in the same house, we would no trouble finding them. [仿2003上海卷-33]

　　---But as traveling salesmen as well as seasonal herdsmen and farmhands, as you know, they move house _______ many of the Americans who live on wheels.

　　A.As far as; as often as 　　　　B.As well as; as well as

　　C.As long as;;as often as 　　D.As long as ; as far as

　　66. He trained hard in puzzle-guessing, a sort of children's game, all year, _____ still failed to reach his best form. in all the tests given to both adults and children. [仿NMET02--39]

　　A.Then 　　　　　B.Thus 　　　　　C.Therefore 　　D.Yet

　　67. _____ he thought he was helping us with the work , he was actually in the way. [仿NMET 1999--11]

　　A.Because 　　B.If 　　　　　　C.Although 　　　D.When