单项选择题

Evidence came up ______ specific speech sounds are recognized by babies as young as six months old.

A．what
B．which
C．that
D．/
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单项选择题
When I was younger I ______ long distance, but now I'm out of practice.
A．was used to walk
B．got used to walk
C．was used to walking
D．used to walking
单项选择题
I remember ______ to help us if we ever got into trouble.
A．once offering
B．him once offering
C．to offer him
D．him to offer
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