单项选择题

A．He has been ill.
B．He hasn’’t yet found a topic.
C．He was busy studying for an exam.
D．He didn’’t know when it was due.
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单项选择题
A．Social work.B．Medical care.C．Applied physics.D．Special education.
A．Social work.
B．Medical care.
C．Applied physics.
D．Special education.
单项选择题
A．A lecture in their American literature course.B．A film about the American frontier.C．A book they both read.D．The woman’’s recent trip to the American Midwest.
A．A lecture in their American literature course.
B．A film about the American frontier.
C．A book they both read.
D．The woman’’s recent trip to the American Midwest.
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