单项选择题

______ raw materials into useful products is called manufacturing.

A．transform
B．transforming
C．being transformed
D．when transforming
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单项选择题
It was ten o’clock ____ he came back.
A．that
B．when
C．so
D．which
单项选择题
____ his words, there were no grounds to justify his complaints.
A．such being
B．such were
C．were such
D．being such
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