单项选择题

Young children soon （）words they hear their elders use.

A．put forward
B．look forward to
C．mm up
D．pick up

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单项选择题
Color-blind people often find it difficult to （）between blue and green.

A．separate
B．distinguish
C．compare
D．contrast
单项选择题
He spoke confidently, （）impressed me most.

A．so that
B．that
C．it
D．which
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