Many people may be surprised by the number of chemicals that they are exposed to through everyday household products.

下面内容表述有错误的一项是（ ）

Health is money.— But I think it is money.

It’s necessary and important for them students at school to join the Clean Plate Campaign（行动）. It’s good for them to form good habits.—Sure. We should try to _______ all the food that we’ve ordered.

Books are made __________ paper while paper is mainly made __________ wood.