a story是单纯地指一个故事,而one of the students是指众多人中的其中一个,是特指,当然要用the修饰student,这个句子完整的应该是this is a story (which)one of the student sent in. sent in 后缺一个宾语,因为in是介词,所以只能接which,做宾语也可不填.
a story 是名词,在这个句子中做先行词。 定语从句中有一个which,但因为在句中做宾语部分,所以省略了 完整的应是: this is a story (which)one of the student sent in. sent in 后 缺一个宾语.但因为in是介词,所以只能接which.当然,做宾语也可不填.