语法填空
【小题1】Lenovo has brought out a new laptop ________   low cost will make it attractive to students.
【小题2】Zhu Yawen’s performances at the CCTV Spring Festival Gara in 2015 were perfect, ________ made a lot of people admire him.
【小题3】He is confident, ________，in my opinion，is most important in modern society.
【小题4】The school library is a resource   ________   you can take advantage to make progress.
【小题5】—How do you understand life?
—It is a constant match ________   the greatest opponent is yourself.