a great deal of 后加的是不可数名词
a lot of后加可数名字和不可数名词
a good many of 接可数名词
a great deal of(大量)后加不可数名词
a great many后面直接加复数可数名词
a great many of 后面跟限定语再跟名词
a large/great number of(= many) 后显然加可数名词
所以本题选:C
a great deal of 后加的是不可数名词
a lot of后加可数名字和不可数名词
a good many of 接可数名词
a great deal of(大量)后加不可数名词
a great many后面直接加复数可数名词
a great many of 后面跟限定语再跟名词
a large/great number of(= many) 后显然加可数名词
所以本题选:C