a great many of+限定词（必须加）+名词
受冠词修饰的名词：a great many of the students
受these,those修饰的名词：a great many of these students
受物主代词修饰的名词：a great many of my students
受所有格修饰的名词：a great many of Tom's students
这题为什么不选择A?并且,如果选择A要怎么改题?
a great many of+限定词（必须加）+名词
受冠词修饰的名词：a great many of the students
受these,those修饰的名词：a great many of these students
受物主代词修饰的名词：a great many of my students
受所有格修饰的名词：a great many of Tom's students