2. 外语
  3. During an average year, about 50 people die from carbon monoxide poisoning in the UK, caused directly by fumes from home heating

During an average year, about 50 people die from carbon monoxide poisoning in the UK, caused directly by fumes from home heating

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问题    During an average year, about 50 people die from carbon monoxide poisoning in the
UK, caused directly by fumes from home heating appliances which are subsequent 【M1】______
discovered to be defective. Several hundreds people a year are made ill by inhaling 【M2】______
the fumes, and have to have hospital treatment. These deaths and illnesses are
unnecessary, and can easily prevented. 【M3】______
   Carbon monoxide has no colour, smell or taste, and it can kill. It can be
given up by any equipment which bums a fossil fuel, such as coal, gas or oil. 【M4】______
Fumes may build up in your home if the equipment is faulty, or if the chimney 【M5】______
is blocked, or if the room don’ t allow circulation of fresh air. Watch out for 【M6】______
any of the following: gas flames burned orange or yellow, and wood or coal 【M7】______
stoves which bum slowly or go out. You yourself may feel sleep, or have 【M8】______
headaches, chest oi stomach pains, sickness or sudden giddiness.
   If you notice any of the above, stop using the appliance. See a doctor
at once if you have physical symptoms. Make sure your heaters are servicing 【M9】______
regularly and keep air vents and windows unblock. 【M10】______
【M6】
选项
答案don’t--doesn’t
解析 原文叙述，“如果设备出现故障，或者如果烟囱堵塞，或者房间不允许新鲜空气流通，家中可能会产生烟雾”。the room为单数名词，助动词的否定形式应为doesn’t，don’t用于第一人称、第二人称及复数名词。因此，将don’t改为doesn’t。
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