单项选择题

A．ought to
B．have to
C．has to
D．get to
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单项选择题
A．TakingB．TakenC．Having takenD．Being taken
A．Taking
B．Taken
C．Having taken
D．Being taken
单项选择题
A．anyB．muchC．manyD．little
A．any
B．much
C．many
D．little
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