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
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The weather ______ us from climbing the mountain.
A. discharged
B. disguised
C. disturbed
D. discouraged
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Evidence came up ______ specific speech sounds are recognized by babies as young as six months old.
A. what
B. which
C. that
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