单项选择题

Corn originated in the New World and thus was not known in Europe until Columbus found it ___________ in Cuba.

A．being cultivated
B．been cultivated
C．having cultivated
D．cultivating
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单项选择题
The hopes, goals, fears and desires widely ___________ between men and women, between the rich and the poor.
A．alter
B．shift
C．transfer
D．vary
单项选择题
I don't mind ___________ the decision as long as it is not too late.
A．you to delay making
B．your delaying making
C．your delaying to make
D．you delay to make
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