题目内容
A year later，with the nation‘s economy ________， Bush’s approval rating dropped below 40 percent.
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Parents， teachers in schools and communicators in or using the mass media are all capable of ________ our potential interests.
Some persons gain goal and direction from their tensions others ________ under pressure.
In the original testㄛall the animals in a test group are given a substance _______ half of them die.
Even with the new development in research， only a tiny ________ of all tests are done without using animals.
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