单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．By predictions.
B．By recording.
C．Through observation.
D．Through interviewing.
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单项选择题
A．That more work is necessary for those facts.B．That animals are helpless to healthy people.C．That animals can also become friends of humans.D．That they had a very successful discovery.
A．That more work is necessary for those facts.
B．That animals are helpless to healthy people.
C．That animals can also become friends of humans.
D．That they had a very successful discovery.
单项选择题
A．Colleagues.B．Mother and son.C．A teacher and a student.D．A prospective employer and an employee.
A．Colleagues.
B．Mother and son.
C．A teacher and a student.
D．A prospective employer and an employee.
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