单项选择题

Steel is an alloy composed （） of iron and carbon.

A．primarily
B．traditionally
C．carefully
D．partially

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单项选择题

A baby might show fear of an unfamihar adult, he is likely to smile and reach out to another in- fant.（）

A．if
B．whenever
C．so that
D．whereas

单项选择题

Many a delegate was in favor of his proposal that a special committee （） to investigate the incident.

A．were set up
B．was set up
C．be set up
D．set up

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