There are several research centers in China a certain disease called Bird Flu is being studied. A．which B．where C．when D．what 题目和参考答案——青夏教育精英家教网—

题目内容

There are several research centers in China ________ a certain disease called Bird Flu is

being studied.

A．which B．where C．when D．what

【答案】

【解析】

试题分析：考查短语从句。本题定语从句的先行词是several research centers,后面的定语从句句子结构很完整，故使用关系副词where引导这个定语从句。A项是关系代词，C项的先行词要是时间的名词；D项不是定语从句的关系词。句意：在中国有几个研究中心，在这些研究中心里，一种名叫禽流感的疾病正在被研究。故B正确。

考点：考查定语从句

点评：解答定语从句的关键是分析句子成分，如果定语从句的句子成分很完整就使用关系副词；如果句子缺少主语，宾语，表语或者定语的时候就使用关系代词。同时也要注意一些关系词的特殊用法，尤其是that的特殊用法，既要注意普遍性，也要注意特殊性。特别关注：Whose是关系词中唯一的一个可以放在名词前面做定语的关系代词，如果缺少定语，用whose引导定语从句，或是of which the+名词/the+名词+of which。要特别注意which引导非限制性短语从句的用法。

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填空（共10小题；每小题1分，满分l0分）

阅读短文，根据所读内容在表中的空格处填上适当的单词或短语。注意：每空不超过3个单词。

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