单项选择题

He used to ______ his teaching when he was young.

A．devote to
B．be devoted to
C．devoting to
D．being devoted to
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单项选择题
According to the passage, which of the following happened on April 10, 1872
A．A great many new trees were planted.
B．J. Sterling Morton was born.
C．The Nebraska state government donated trees.
D．A million prizes were awarde
单项选择题
We wanted to know whether the terms had been ______.
A．agreed on
B．agreed with
C．agreed to
D．agreed about
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