单项选择题

The space shuttle program entails the use of sophisticated technology（）.

A．enhances
B．develops
C．creates
D．involves

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单项选择题

The National Industrial Recovery Act was designed to spur industry（）.

A．tax
B．stimulate
C．censure
D．rebuke

单项选择题

Miguel''s perplexity is understandable — he''s an all-purpose maintenance man at a mid-town-Manhattan residential building（）.

A．all out
B．versatile
C．prolific
D．capable

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