单项选择题

A．To show that they have very different behaviors.
B．To show that they send out different messages by their silent language.
C．To show that they have nothing important to do.
D．To show that they are not happier for being kept waiting.
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单项选择题
A．This apple pie tastes very good.B．His mother likes the pie very much.C．This pie can’’t match his mother’’s.D．His mother can’’t make apple pies.
A．This apple pie tastes very good.
B．His mother likes the pie very much.
C．This pie can’’t match his mother’’s.
D．His mother can’’t make apple pies.
单项选择题
A．Make up homework problems.B．Do research in the library.C．Teach an introductory economics course.D．Grade homework sets.
A．Make up homework problems.
B．Do research in the library.
C．Teach an introductory economics course.
D．Grade homework sets.
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