题目内容
8．-How long haven't you been on vacation？-For a year．I will go to Mexico for a trip when my season project________．
| A． | is finished | B． | have been finished | ||
| C． | will be finished | D． | has finished |
分析 ---你多久没去度假了？？
---一年了，当我的季节性的工程完成后我就会去墨西哥度假，
解答 答案：A．when引导的时间状语从句，遵循主将从现的规则，从句主语my season project是动词finish的承受者，故用一般现在时的被动语态be+过去分词，主语单数，故is，故答案是A．
点评 在时间、条件状语从句中，主句用一般将来时，从句要用一般现在时代替一般将来时．
例如：
I will let you know if he comes．
We will inform him when he gets here．
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