单项选择题

He promised to return the book the next day without ______ .

A．fail
B．default
C．trouble
D．failure
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单项选择题
Be careful with John; I think he has ______ motives for being so generous.
A．ultimate
B．ulterior
C．interior
D．hidden
单项选择题
I'd sooner you ______ deliver the sofa tomorrow.
A．didn't
B．shouldn't
C．wouldn't
D．mustn't
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