单项选择题

In （）times human beings did not travel for pleasure but to find a more favourable climate.

A．prime
B．primitive
C．primary
D．preliminary

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单项选择题
Put on dark glasses or the sun will （）you and you won' t be able to see.

A．discern
B．distort
C．distract
D．dazzle
单项选择题
To （）is to save and protect, to leave what we ourselves enjoy in such good condition that others may also share the enjoyment.

A．conserve
B．conceive
C．convert
D．contrive
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