Mass deaths of birds were not unheard of, but they normally happened unnoticed a
题型:不详难度:来源:
Mass deaths of birds were not unheard of, but they normally happened unnoticed at sea or in rural areas away from towns. Many birds are weak and die in winter _______ food is scarce. |
答案
C |
解析
试题分析:考察定语从句。本题定语从句的先行词是winter,后面定语从句中的句中成分很完整,故使用关系副词when引导该定语从句。BD两项不能引导定语从句,which在定语从句中做主语,宾语,表语等。句意:很多鸟很虚弱都死在食物紧缺的冬天。故C正确。 点评:解答定语从句的关键是分析句子成分,如果定语从句中句子成分很完整就使用关系副词来引导;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/as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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