单项选择题

When Columbus reached the New World, corn was the ______ in Americ

A． widely most grown plantB. most widely grown plantC. most grown widely plantD. plant widely grown most
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单项选择题
A．olderB．tallerC．StrongerD．smarter
A．older
B．taller
C．Stronger
D．smarter
单项选择题
A．sinceB．now thatC．therebyD．whereas
A．since
B．now that
C．thereby
D．whereas
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