题目内容

17．More than 100students in that school_________ abroad for further study so far．（　　）
A．are sentB．were sentC．had been sentD．have been sent

分析 到目前为止，那个学校已经有100多人被送往国外深造了．

解答 答案是． 考查被动语态，．本题考查现在完成时和被动语态，so far常与现在完成时连用，student是和send是动宾关系，即，学生是被派往国外的，应该使用被动语态，故选D．

点评 被动语态由"助动词be+及物动词的过去分词"构成．被动语态的时态变化只改变be的形式，过去分词部分不变．疑问式和否定式的变化也如此．掌握各种时态的被动语态是解题的关键．

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