单项选择题


A．keep
B．keeping
C．have kept
D．kept
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单项选择题
A．MoreoverB．ThusC．HoweverD．Furthermore
A．Moreover
B．Thus
C．However
D．Furthermore
单项选择题
A．taken inB．taken upC．taken overD．taken on
A．taken in
B．taken up
C．taken over
D．taken on
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