单项选择题

A．The train is crowded.
B．The train is late.
C．The train is empty.
D．The train is on time.
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A．replaced forB．replaced byC．substituted forD．substituted with
单项选择题
What does the first paragraph tell us about Westhusin’’s dog cloning project
A．Its success is already in sight.
B．Its outcome remains uncertain.
C．It is doomed to utter failure.
D．It is progressing smoothly.
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