2. 外语
  3. By making some very simple changes at home, old people ______. A personal alarm is designed for old people to ______.

By making some very simple changes at home, old people ______. A personal alarm is designed for old people to ______.

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问题 By making some very simple changes at home, old people ______.
A personal alarm is designed for old people to ______.
选项 A、detect safety conditions at home
B、avoid falls in the bathroom
C、send out signals for help
D、make phone calls easily
答案C
解析 本题为细节题。由题干personal alarm 定位到文章倒数第一句“...the alarm automatically sends a signal，which gets someone to call and see if the person needs help.”(……警报器自动发出信号，这会叫来其他人，来看看这个人是否需要帮助。)C项send out signals for help与此句一致，为同义转述。因此，答案为C。
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