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Questions 11-13 are based on the following talk. You now have 15 seconds to read Questions 11-13.
How much is the damage done to the United States each year by red ants

A．3 billion dollars.
B．4 billion dollars.
C．5 billion dollars.
D．6 billion dollars.

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Health experts have discovered that adding low-calorie vegetable broth to the start of a meal can actually help to ______ .

Questions 11-13 are based on the following talk. You now have 15 seconds to read Questions 11-13. How much is the damage done to the United States each year by red ants 您的浏览器不支持 audio 元素。