Use the following to fill in the black.
circumvent
perplex
transform
perpetual
persistence
petinent
persevere
Throughout history, many inventors have dreamed of desingning a __1__. One __2__ fact, however, is that the device must permit ___3__, or constancy, of motion withouth the aid of the outside energy source. This situation continues to __4___ scientist. But if inventors___5___, they may manage to __6___ the problem the may ___7__ failure into
success.
1.
2.
3.
4.
5.
6.
7.
2006-09-30
12:13:00
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4 answers
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asked by
Mesalina
1
in
Society & Culture
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