单项选择题

You can never use my tape recorder,________ time should you touch that machine.

A．At no
B．Any
C．At any
D．No
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单项选择题
George had difficulty in swimming across the lake, but he finally succeeded on his fourth________.
A．attempt
B．display
C．effort
D．trial
单项选择题
There is no point________ in the dangerous place if you can't do anything________ the people who have to stay there.
A．remaining...helping
B．to remain...to help
C．in remaining...to help
D．in remaining ... helping
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