单项选择题

They stayed up late trying to ______out a way to solve the problem.

[A] let
[B] give
[C] knock
[D] figure
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单项选择题
Human beings have ______themselves to very diverse environments with the help of fire, agriculture and machines.
[A] adapted
[B] addicted
[C] adopted
[D] adhered
单项选择题
His only wish, before he passed away, ______.poverty of the underdeveloped areas has been put into reality step by step now.
[A] eliminating
[B] eliminated
[C] was to eliminate
[D] to eliminate
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