单项选择题

Space vehicles were launched into outer space______search of another livingplanet.

A. to
B. at
C. in
D. for
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单项选择题
Evidence came up______specific speech sounds are recognized by babies as young as 6 months old.
A. where
B. that
C. which
D. what
单项选择题
Women all over the world are______equal pay for equal jobs.
A. calling on
B. calling about
C. calling off
D. calling for
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