单项选择题

Questions 32 to 35 are based on the passage you have just heard.

A. To determine who will graduate this year.
B. To discuss the seating arrangement.
C. To choose the chairperson of the ceremonies.
D. To begin planning the graduation ceremonies.

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单项选择题

A. They have difficulty identifying these cells.B. They aren’t sure how these cells work.C. They’ve learned how to reproduce these cells.D. They’ve found similar cells in other species.

A. They have difficulty identifying these cells.
B. They aren’t sure how these cells work.
C. They’ve learned how to reproduce these cells.
D. They’ve found similar cells in other species.

Questions 32 to 35 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Questions 32 to 35 are based on the passage you have just heard.