单项选择题

A．By taking out a patent on it.
B．By building houses.
C．By further perfecting his design.
D．By telling others.
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单项选择题
A．Tom will certainly come to repair the stereo.B．Tom cannot repair the stereo.C．Tom doesn’t keep his word.D．Tom is very trustworthy.
A．Tom will certainly come to repair the stereo.
B．Tom cannot repair the stereo.
C．Tom doesn’t keep his word.
D．Tom is very trustworthy.
单项选择题
A．A cake tin.B．A microwave oven.C．A rolling pin.D．Flour.
A．A cake tin.
B．A microwave oven.
C．A rolling pin.
D．Flour.
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