单项选择题

Com originated in the New World and thus was not known in Europe until Colmnbus found it ______ in Cuba.

A．being cultivated
B．been cultivated
C．having cultivated
D．cultivating
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单项选择题
President Wilson attempted to ______ between the powers to end the war, but neither side was prepared to give in.
A．segregate
B．whirl
C．compromise
D．mediate
单项选择题
The Spanish team, who are not in superb form, will be doing their best next week to _______ themselves on the German team for last year's defeat.
A．remedy
B．reproach
C．revive
D．revenge
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