单项选择题

______ we used hand tools; later we had machines.

A. At the first
B. In the beginning
C. The first
D. At the beginning of
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Passengers can now buy their aeroplane tickets faster, ______ the new computer.
A. thank to
B. thank for
C. thanks to
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单项选择题
He' s a different man ______ what he was 10 years ago.
A. with
B. from
C. in
D. on
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