A．usedB．offeredC．triedD．attempted

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• 1、回答（61）题 查看材料A.taughtB.believedC.triedD.allowed
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• 2、A similar approach can be ______to innovation.A．usedB．appliedC．triedD．employed
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• 3、【C7】A．usedB．happenedC．seemedD．found
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• 4、A．didB．builtC．triedD．conducted
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• 6、【C18】A．usedB．chosenC．takenD．spent
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