题库
题库
A．Some giant industrial polluters have gone out of business.
B．More environmental organizations have appeared.
C．Many toxic sites in America have been cleaned up.
D．More branches of her company have been set up.
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| 单选题 | The author’s chief concern about the current U.S. health care system is __________. | 查看答案 |
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| 单选题 | What is the main topic of this passage? | 查看答案 |
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| 单选题 | Faced with the government threats to cut reimbursements indiscriminately, primary care physicians have to __________ . | 查看答案 |
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