What enables some people to get big creative breakthroughs while others only get small and non-creative breakdowns, blaming themselves and society? Are some people "gifted"? Are there other factors __21__ work--factors that we have more control over than we think? While nobody can deny the __22__ that some people seem to be blessed with particular creativity, research shows that anyone can __23__ their chances of coming up with new and original ideas __24__ they would only engage themselves more in the process of __25__. It&39; s the old Thomas Edison thing about "discovery__26__ 99 percent perspiration (汗水) and 1 percent inspiration. " __27__ , the studies prove this:great creative breakthroughs usually happen only __28__ intense periods of struggle. It is sustained effort towards a specific goal __29__ eventually prepares for great creative insights. This kind of sustained effort does not always __30__ immediate results, a fact that not only separates the innovators (革新者) from non-innovators, but __31__leads some people to conclude that it is just not __32__ for them. "Maybe I should have gone to medical school like my mother wanted," they wonder when the breakthrough is __33__ to be found. Alas, one forgets during inevitable encounters __34__self-doubt,that the big surprise is never __35__. Indeed,it can happen at any time and place. 21______ A.to B.in C.at D.by 22A.issue B.problem C.reason D.fact 27A.Sooner or later B.Some day or other C.Every now and then D.Time and again 28A.beyond B.after C.above D.through 29A.that B.who C.what D.as 30 A.create B.produce C.inspire D.encourage 31A.too B.once C.again D.also 33A.anywhere B.everywhere C.somewhere D.nowhere 34A.against B.across C.with D.into 35A.far away B.used up C.cleared off D.near by 23A.miss B.reduce C.increase D.lose 32A.good B.difficult C.possible D.stupid 24A.because B.if C.while D.whether 25A.creation B.practice C.production D.achievement 26A.being B.be C.was D.were