Children of educated and upper-middle-class parents turn out to be far more curious, even at early ages, than children of working class and lower class families.

2017年12月四级真题（第二套）阅读 Section B

It's based on a somewhat fantasized, very white, very upper-middle-class ideology that says if you're failing to expose your child to 30,000 words you are neglecting them.

2017年考研真题（英语二）阅读理解 Section Ⅱ