单项选择题

Questions 18～21 are based on the following dialogue. How many courses did she take last semester

A．3.
B．4.
C．5.
D．6.
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单项选择题
What is unusual about the new kind of clothes
A．The clothes have a built-in air-conditioner.
B．The clothes have several layers of fibers.
C．The clothes will warm up when it’s cold.
D．The clothes will cool off when it’s cold.
单项选择题
What does the speaker think is the best way to study human psychology
A．Use experimental data only.
B．Ask people’s opinions on various matters.
C．Use statistical data based on scientific models.
D．Observe people in real-life situations.
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