题目内容
11．-When will you hand in your book report？-Sorry，I'm not sure．I writing it yet．（ ）
| A． | didn't finish | B． | don't finish | ||
| C． | haven't finished |
分析 --你什么时候交读书报告？
--对不起，我不确定，我还没有写完呢．
解答 答案：C 根据yet，可知应该用现在完成时态．yet是现在完成时的标志词．现在完成时态表示过去发生或已经完成的动作对现在造成的影响或结果或从过去已经开始，持续到现在的动作或状态，本题是过去发生或已经完成的动作对现在造成的影响或结果，现在完成时态的构成：助动词have/has+过去分词，根据主语I，所以应该用haven't finished，故选：C．
点评 本题主要考查动词时态，做此类题目要注意时间状语、标志词．根据上下文所表达的含义，做出判断．同时更应记清时态的构成形式．就本题而言，主要考查现在完成时态．
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