单项选择题

The Car Club couldn't ______ to meet the demands of all its members.

A．assume
B．ensure.
C．guarantee
D．confirm
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单项选择题
______ many times, this radio receiver is found very sensitive.
A．Being tested
B．Having been. tested
C．Having tested
D．Testing
单项选择题
He told me only part of the story ______.
A．so that was it
B．so that was this
C．and that was so
D．and that was that
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