When a student has made a sentence “I borrowed a paper from Miss Li”, the teacher says “Do you mean a piece of paper ” Here the teacher is playing the role of a（n）______.

单选题

When a student has made a sentence “I borrowed a paper from Miss Li”, the teacher says “Do you mean a piece of paper ” Here the teacher is playing the role of a（n）______.

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单选题

When I was a student, I was used to ___ at six.

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材料题

ence______(10) in the library.Professors will help students who need it,but______(11) that their students should not be______(12)dependent on them.In the United States professors have many other duties______(13)teaching,such as administrative or research work.Therefore, the time that a professor can spend with a student outside of class is______(14).If a student has problems with classroom work,the student should either______(15)a professor during office hours or make an appointment.1._________

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