题目内容
20.听第10段材料,回答第17至20题.17.What is Karl Robert?
A.A researcher. B.A teacher. C.A librarian.
18.When will the research lab be used?
A.On Thursday. B.On Wednesday. C.On Tuesday.
19.What will a research project probably determine?
A.A student's grade. B.A student's performance. C.An appointment.
20.How long are the speaker's office hours?
A.Two hours. B.Three hours. C.Four hours.
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