单项选择题

The introduction of fabrics made from rayon, nylon and other _______ fibers has made many changes in our civilization.

A．manufactured
B．artificial
C．synthetic
D．manned
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单项选择题
He is too weak to _______ his business.
A．do with
B．do without
C．do away with
D．do up
单项选择题
_______ he is appointed as general manager of the company.
A．Be a man ever so young
B．So young as a man ever is
C．No matter he is young
D．A man ever so young
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