2. 职称英语
  3. It is essential that international passengers check______at least two hours befo

It is essential that international passengers check______at least two hours befo

游客2025-06-13  2
问题 It is essential that international passengers check______at least two hours before their flight.
选项 A、on
B、off
C、in
D、up
答案 C
解析 词汇：介词1．这是一道词汇题，选项均为介词。2．出现international passengers，flight等单词说明背景应为机场。机场中，办理登机手续应使用固定搭酉己“check in”。3．check on意为“确认”，check off意为“检查完毕”，check up意为“检查、身体检查”。
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