单项选择题

______ of plastics, the machine works perfectly.

A．Being made
B．Having made
C．Made
D．To be made
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单项选择题
—Why were you absent(缺席的) from the meeting yesterday —I ______ the meeting, but a traffic accident ______ me.
A．must have attended, delayed
B．might have attended, had delayed
C．should have attended, delayed
D．could have attended, bad delayed
单项选择题
Neither you nor he ______ to blame.
A．is
B．be
C．are
D．am
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