单项选择题

A．The tractor.
B．The ear.
C．The wheel.
D．The steam engine.
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单项选择题
A．Giving a lecture.B．Discussing physics problems.C．Waiting for a friend.D．Reading twentieth-century literature.
A．Giving a lecture.
B．Discussing physics problems.
C．Waiting for a friend.
D．Reading twentieth-century literature.
单项选择题
A．She’s unable to attend the study session.B．She has seen a doctor recently.C．She’s concerned about medical care.D．She mentions the need for some medical tests.
A．She’s unable to attend the study session.
B．She has seen a doctor recently.
C．She’s concerned about medical care.
D．She mentions the need for some medical tests.
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