Heavy smog blankets Beijing． ,city authorities start using its new smog w
题型：不详难度：来源：
Heavy smog blankets Beijing． ,city authorities start using its new smog warning system．| A．In turn | B．In time | C．In response | D．In return |
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答案
| C |
解析
试题分析：考查介词短语辨析。A．In turn 轮流；B．In time及时；C． In response作出回应；D． In return作为报答。句意：严重的雾霾覆盖北京，作为回应，城市当局可使用新的雾霾警告系统。根据句意，上文提到雾霾严重，故作出回应，所以选C项。
考点 : 考查介词短语辨析 |
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