单项选择题

What’s the commission of the X-43A prototype

A．To revolutionize research and develop speed.
B．To revolutionize travel and shatter speed records.
C．To revolutionize flight and explore outer space.
D．To revolutionize exploration and increase experience.
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单项选择题
The research reviewed in the passage suggest that ______.
A．remarried men live healthier lives.
B．unmarried men have the longest life spans.
C．widowers have the shortest life spans.
D．widows are unaffected by their mates’death.
单项选择题
Some senior legislators accused Wahid of ______.
A．violating the congress by embazzlement
B．violating the constitution by hiring the chief without consulting congress
C．violating the congress by firing the chief without consulting lawmakers
D．vi6iating the constitution by firing the chief without consulting parliament
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