单项选择题


A．ready
B．free
C．busy
D．sure
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单项选择题
It's no use ____________ with him. He won't change his decision.
A．arguing
B．to argue
C．to be arguing
D．if you argue
单项选择题
I couldn't help ____________ sorry for her. Her mother died when she was three.
A．feel
B．to feel
C．felt
D．feeling
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