单项选择题

You should know better than ______ the risk of gambling.

[A] to run
[B] running
[C] to have run
[D] ran
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At present much more stress has been laid ______ law and order by the local government.
[A] onto
[B] at
[C] on
[D] to
单项选择题
In 1914, an apparently insignificant event in a remote part of Eastern Europe ______ Europe into a great war.
[A] plunged
[B] imposed
[C] pitched
[D] inserted
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