3.No one thought of anything even a little bit like the zipper until Whitecomb L.Judson came along. There were buttons and button-holes, hooks and eyes, laces and buckles. They all took an irritatingly long time to do up, especially when me...

11.After a few rounds of talks, both sides regarded the territory dispute _______ . A. being settled B. to be settled C. had settled D. as settled ...

5.The words of his old teacher left a _____ impression on his mind.He is still influenced by them. A. long B. lively C. lasting D. liberal ...

19.The patient＇s health failed to such an extent that he was put into _______ care. A. tense B. rigid C. intensive D. tight ...

13.The last half of the nineteenth century _______ the steady improvment in the means of travel. A. has witnessed B. was witnessed C. witnessed D. is witnessed ...

7.If she doesn＇t tell him the truth now, he＇ll simply keep on asking her until she _______. A. does B. has done C. will do D. would do ...

1.Because Edgar was convinced of the accuracy of this fact, he _______ his opinion. A. struck at B. strove for C. stuck to D. stood for ...

15.The mere fact _______ most people believe nuclear war would be madness does not mean that it will not occur. A. what B. which C. that D. why ...

9.It seems oil _______ from this pipe for some time. We＇ll have to take the machine apart to put it right. A. had leaked B. is leaking C. leaked D. has been leaking ...

3.You cannot be _______ careful when you drive a car. A. very B. so C. too D. enough ...