单项选择题

The vast ______ area of this country enabled us to welcome the hordes of immigrants that flocked to our shores.

A．teeming
B．explored
C．flourishing
D．undeveloped
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单项选择题
The candidate's speech was filled with empty promises, ______ and cliches.
A．candor
B．platitudes
C．anger
D．threats
单项选择题
It's time-consuming to locate the book in the bookcase, because the way he arranges books is quite ______.
A．mighty
B．wholesome
C．undesirable
D．random
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