单项选择题

A．which
B．than
C．as
D．that
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单项选择题
A．attainingB．acquiringC．obtainingD．achieving
A．attaining
B．acquiring
C．obtaining
D．achieving
单项选择题
A．kept upB．carried outC．set upD．worked out
A．kept up
B．carried out
C．set up
D．worked out
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