单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．A new fuel for buses.
B．The causes of air pollution.
C．Careers in environmental engineering.
D．A way to improve fuel efficiency in buses.
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Evaluation by Students 1．不少大学让学生参与任课老师教学情况的测评 2．对此改革措施校方、教师、学生的看法不一 3．学生测评教师的益处以及可能产生的问题
单项选择题
A．She hasn’t called the travel agency yet.B．The man may have to reschedule his trip.C．She doesn’t know when her semester ends.D．The man should take his vacation somewhere else.
A．She hasn’t called the travel agency yet.
B．The man may have to reschedule his trip.
C．She doesn’t know when her semester ends.
D．The man should take his vacation somewhere else.
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