2. 外语
  3. This type of heater is a good choice for the quick heating of enclosed spaces. However, it should not be left______.

This type of heater is a good choice for the quick heating of enclosed spaces. However, it should not be left______.

admin2020-05-13  65
问题 This type of heater is a good choice for the quick heating of enclosed spaces. However, it should not be left______.
选项 A、unused
B、unorganized
C、unattended
D、unexpected
答案C
解析 空格位于“取暖器不可无人看管”的内容之后，因此要填入描述取暖器无人看管的状态的分词词汇。意为“无人照料的；无人看管的”的unattended在上下文中最合适，将其看作leave something unattended(放任／放着……不管)的被动形式即可。
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