单项选择题


A．difficulty
B．trouble
C．case
D．problem
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单项选择题
A．arguingB．promisingC．takingD．advising
A．arguing
B．promising
C．taking
D．advising
单项选择题
A．havingB．playingC．alsoD．making
A．having
B．playing
C．also
D．making
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