Directions: For each blank in the following passage, there are four choices marked A, B,C and D. Choose the one that is most suitable.

    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 factorswork—factors that we have more control over than we think?
    While nobody can deny thethat some people seem to be blessed with particular creativity, research shows that anyone cantheir chances of coming up with new and original ideasthey would only engage themselves more in the process of. It's the old Thomas Edison thing about "discovery99 percent perspiration (汗水) and 1 percent inspiration." , the studies prove this: great creative breakthroughs usually happen onlyintense periods of struggle. It is sustained effort towards a specific goaleventually prepares for great creative insights.
    This kind of sustained effort does not alwaysimmediate results, a fact that not only separates the innovators (革新者) from non-innovators, butleads some people to conclude that it is just notfor them. "Maybe I should have gone to medical school like my mother wanted," they wonder when the breakthrough isto be found. Alas, one forgets during their inevitable encountersself-doubt, that the big surprise is never. Indeed, it can happen at any time and place.