单项选择题

The laser represents a true marriage between science and technology, the men who devised it were（）engineers and physicists.

A. spontaneously
B. simultaneously
C. instantaneously
D. homogeneously

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If any law and order（）not maintained, neither the citizen nor his property is safe

A．be
B．are
C．were
D．is
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She was extremely lucky; when her great-uncle died, she（）a fortune.

A. came by
B. came over
C. came into
D. came about
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