题目内容
In many cities of China, if an ambulance is＿＿in a traffic jam, police will respond to the emergency.
| A．held up | B．held back |
| C．held down | D．held out |
A
解析试题分析：考查动词短语。A. held up举起耽搁；B. held back阻止；C. held down压低；D. held out伸出；句意：在中国许多城市，如果救护车被塞车，警察会马上支援。根据in a traffic jam可知陷入塞车，故选A项。
考点 : 考查动词短语
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