单项选择题


A．responsibility
B．carelessness
C．possibility
D．irresponsibility
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单项选择题
A．to havingB．to haveC．havingD．have
A．to having
B．to have
C．having
D．have
单项选择题
A．togetherB．quicklyC．independentlyD．carefully
A．together
B．quickly
C．independently
D．carefully
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