Questions 1-6 Choose the appropriate letters A-D and write them in boxes 1-6 on your answer sheet. *

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问题 Questions 1-6
Choose the appropriate letters A-D and write them in boxes 1-6 on your answer sheet.

*

选项 A、dishwashers are very efficient machines.
B、tap water is as polluted as bottled water.
C、indoor pollution rivals outdoor pollution.
D、gas masks are a useful protective device.

答案C

解析 Para 8: ... disproportionate effort is wasted campaigning against certain forms of outdoor pollution, when there is as much ... indoors, right under people’s noses.
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