Question

高二英语选择

Music should be taught routinely in schools because of the benefits ______ can
have on the development of the brains of young children.

　　A. which B. that

　　C. it D. one
为什么不选A或者B

Answer 1

Music should be taught routinely in schools because of the benefits ______ can
have on the development of the brains of young children.
选D比较恰当。benefits 后面的句子can前缺主语，have后缺宾语，根据have可以知道如果选that/which的话，that/which代替benefits充当了can have的主语，那是不对的。综合起来选择one。完整结构：
Music should be taught routinely in schools because of the benefits (that/which) one can
have on the development of the brains of young children.

Answer 2

　　C. it
　　it can have on the development of the brains of young children.是以music为先行词的定语从句，该从句省略了关系代词that 或which，但因为关系代词作定从里have的宾语，所以可以省略。
　　it指music

Answer 3

因为横线之后的结构是benefits的定语从句 可以看出从句少一个主语
而这个句子的完整结构是将定语从句之前的先行词（which或者that）省略了
弄懂句子结构就是知道为什么不能选A或者B了

Answer 4

C. it　　it指music