单项选择题

21()

A.in
B.down
C.along
D.through

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单项选择题
What he said just now had little to do with the question ______ discussion.
A.on
B.in
C.under
D.at
单项选择题
In 1914, an apparently insignificant event in a remote part Of Eastern Europe ______ Europe into a great war.
A.increased
B.imposed
C.passed
D.plunged
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