单项选择题


A．arbitrary
B．voluntary
C．involuntary
D．obligatory
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单项选择题
A．extendedB．intendedC．attendedD．pretended
A．extended
B．intended
C．attended
D．pretended
单项选择题
A．thatB．whichC．whoseD．what
A．that
B．which
C．whose
D．what
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