1 日本大学生的比例比中国高的多。
2 我们只用收入的百分之3缴房租。
3 在我国有些城市，人们已经开始用分期付款的办法购买电视机、洗衣机等家用物品。
4 在大多数情况下，用现金购买物品比分期付款便宜。
5 在20世纪中叶，收音机在西方已经很普遍了。
參考答案:the percentage of the undergraduate in Japan is higher than in China.
we spend the 3% of the earnings on room rent.
In some cities of my country, people began to purchase something like TV, washing machine on installment
In most cases, cash is cheaper than on installment
In the middle of 20 century, radio is so common in West.