题目内容
3.Once the flight isconfirmed(确定),you can pay for it.分析 一旦确定了航班,你就可以付钱了.
解答 confirmed confirm是一个动词,意为"确定,确认",once意为"一旦",引导从句,从句的主语是flight(航班),与confirm构成逻辑上的被动关系,因此要使用被动语态(be+done),故这里填confirm的过去分词形式confirmed与前面的be动词is构成被动语态,表示"航班被确认".
点评 考查动词词义,写动词时应注意其人称、时态和语态的变化.
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