单项选择题

We are now quite different from ______ human beings.

A．prime
B．primitive
C．primary
D．preliminary
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单项选择题
You can hardly ______ the city from the top of the mountain because of the heavy smog hovering over it.
A．dazzle
B．discern
C．distort
D．distract
单项选择题
While we were visiting our navy , the soldiers took us twice ______ in the open sea.
A．gliding
B．cruising
C．piloting
D．patrolling
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