A．make it more colorful B．teach children to write neatly C．help children recognize simple letters D．force children to develop the habit of reading
单项选择题（5）处应填写（）
A．of B．on C．in D．about
单项选择题Millions of Americans are in danger of suffering hearing loss because they（）
A．take too much aspirin every day B．often take planes on trips C．are surrounded by loud noises at home or at work D．like listening to loud music
