5．該動身了，飛機一小時后起飛．
It's timeto set off，since the plane will take off in an hour．

分析 該動身了，因為飛機一小時后起飛．

解答 答案：It's，to．首先要認真閱讀漢語句子和英語句子，可知要用一個結(jié)構(gòu)：It's time to do sth．該做什么的時候了，結(jié)合"____time____ set off"所以要用It's，to，故填It's，to．

點評 首先要熟練掌握結(jié)構(gòu)：It's time to do sth．該做什么的時候了，然后仔細比對英語句子和漢語句子，找出缺失的部分，就可以確定正確答案．

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