The reason---she gives for not coming to the party is that h

1。 答案：A。2。 解释：1）此题考查定语从句的关系词。2）句子主干是：The reason is that her mothor won't let her。而定语从句 ___ she gives for not coming to the party修饰该句主语the reason。关系词代替先行词the reason做该定语从句中gives的宾语,所以只需用关系代词which/that,当然也可以省略不用。即：(which/that) she gives for not coming to the party= she gives which/that for not coming to the party= she gives the reason for not coming to the party3）但是主句已经含有一个以that引导的表语从句,所以根据语言所共有的不重复的惯例,用which要比that更好。所以,最佳答案为A which。