单项选择题

A．vessels
B．routes
C．paths
D．channels
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单项选择题
A．genuinelyB．obviouslyC．presumablyD．frequently
A．genuinely
B．obviously
C．presumably
D．frequently
单项选择题
A．other thanB．as well asC．instead ofD．more than
A．other than
B．as well as
C．instead of
D．more than
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