单项选择题

Questions 22 to 25 are based on the passage you have just heard.

A. The students must follow all instructions exactly.
B. The students will be able to make choices about the laboratory work.
C. A great deal of equipment is available.
D. Homework must be handed in on time.
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单项选择题
A. To give an example of a bad reaction to penicillin.B. To show how penicillin has changed over the years.C. To emphasize the importance of antibiotics.D. To explain why penicillin requires a prescription.
A. To give an example of a bad reaction to penicillin.
B. To show how penicillin has changed over the years.
C. To emphasize the importance of antibiotics.
D. To explain why penicillin requires a prescription.
单项选择题
D
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