2. 职称英语
  3. During an average year, about 50 people die from carbon monoxide poisoning in

During an average year, about 50 people die from carbon monoxide poisoning in

游客2023-10-19  83
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】______ [br] 【M10】
选项
答案 unblock一unblocked
解析 原文叙述，“确保你的加热器定期维修，保持通风口和窗户畅通”。句中的keep的用法是keep sth．+adj．，unlock(打开；开启)的过去分词形式unblocked，可作形容词修饰air vents and windows。因此，将unblock改为unblocked。
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