One of the strangest things about invention is that many are made not once, but several times–usually in various countries but within the space of a few years. It seems that ___[all of a sudden/ all of sudden/ all of the sudden/ all of any sudden] some great idea is“in the air”, and people ____[in/ with/ by/ of] inventive minds begin to ____[work out/ work with/ work on/ work up] it, perhaps without knowing that somebody else _____[have/ had/ has/ would have] already been exploring and experimenting on just the same lines. But ____[only/ at/ for/ just] once did it happen that an invention was made ___[once/ twice/ several times/ many tines] in the same year with equal success, ___two men who worked only sixty miles apart from each other ____[with/ without/ besides/ for] even knowing of each other’s ___[existence/ extent/ expense/ expert]–and without even meeting each other throughout their lives! Their invention was one that ___[has shaped/ has made/ had shaped/ had made] our everyday lives more than any other: the motor-car.

　　答案：1. all of a sudden (突然)

　　2.with

　　3.work out

　　4. has

　　5. only(倒装)

　　6.twice

　　7. by

　　8. without

　　9.existence(存在)

　　10. has shaped