单项选择题

Without the friction between their feet and the ground, people would______ be able to walk.

A．in no way
B．on any account
C．by all means
D．in no time
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单项选择题
After having gone ______far, George did not want to turn back.
A．enough
B．much
C．such
D．that
单项选择题
I______ the book. I may well borrow one from the library.
A．need to have bought
B．need have bought
C．needed not bought
D．needn't have bought
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