23.   How can an inventor invent things? The most important thing is how to ________.

         A.get knowledge       B. use his head well      C. teach everything

24.   Who changes the world a lot?

         A.Teachers.        B. Students.        C. Great inventors.

25.   Which of the following shows the most important idea of this passage?

        A.School education is important for a person.

        B.A student should learn how to study.

        C.A student cannot learn everything from school.

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26.   They must be doctors, ___________ they?

A. mustn¡¯t     B. needn¡¯t      C. aren¡¯t      D. are

27.   He is so careful that he always looks over his exercise to _______ there are no mistakes.

A. make sure   B. find out      C. think about      D. try on

28.   Joe can¡¯t be in the office yesterday afternoon. He ___________.

A. slept       B. was sleeping   C. has slept    D. will sleep

29.   --- Is that Henry speaking?

---Yes. ___________?

A. Who¡¯s that     B. Who are you     C. Speaking     D. What¡¯s your name

30.   ______ good news you¡¯ve told me!

A. How        B. How a        C. What      D. What a

31.   --- Is that all? Do you want __________?