单项选择题


Questions 13 to 15 are based on the conversation you have just heard.

A．Because some book in the library are very expensive.
B．Because some books in the library are rare.
C．Because sometimes students need certain materials urgently.
D．Because some students won’t return the books they borrow.
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单项选择题
A．Consumers are adequately informed about the environmental impact of products they buy.B．Consumers are being confused and misled by the huge amount of environmental claims of household products.C．Consumers protest that many household products make false environmental claims.D．Governments should take measures to test the environmental claims made by products.
A．Consumers are adequately informed about the environmental impact of products they buy.
B．Consumers are being confused and misled by the huge amount of environmental claims of household products.
C．Consumers protest that many household products make false environmental claims.
D．Governments should take measures to test the environmental claims made by products.
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