选项中有:1. To clarify what is a tax.2.To explain why tax is important to society.3.To tell us how much we should pay in tax.4.To list some of the benefits that tax can bring.5.To show how taxes affect different groups in our society.6.None of these.
4.在单数称谓名词前,或以man / woman 引起的名词前加the,表示一类人时,前加the,相当于all 一类人,但复数前不加。如: the boy 那个男孩;The boy is clever that boy is clever那个男孩很聪明 The boys are clever 男孩们很聪明 the rich富有者 the businessman商人 the man doctor男医生
5.用于世界上独一无二的事物,及乐器类前。如the sun月亮,the violin小提琴。
6.在形容词前加the,表示一类人。如the poor穷人,the blind盲人 世界上独一无二的事物,及乐器类前:The sun is very hot.Sunlight is bad for your skin. Poverty is a big problem in some country.
乐器:Would you like to play the piano for us? (定冠词the用于表示乐器,强调工具) I like playing tennis very much. (定冠词the 不用于表示球类)
形容词:The disabled will get more and more care in our country. The old should have a quiet place to live in.