单项选择题

A．Availability of artificial body organs.
B．Elimination of genetic defects.
C．Improvements in drags for medical use.
D．An explanation of the origin of life.
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单项选择题
A．He buys a similar thing of the color he wants.B．He usually does not bay anything.C．At least two of his requirements must be met before he buys.D．So long as the style is right, he buys the thing.
A．He buys a similar thing of the color he wants.
B．He usually does not bay anything.
C．At least two of his requirements must be met before he buys.
D．So long as the style is right, he buys the thing.
单项选择题
A．They welcome suggestions from anyone.B．Women rarely consider buying cheap clothes.C．Her shopping is often ’based on need.D．They listen to advice but never take it.
A．They welcome suggestions from anyone.
B．Women rarely consider buying cheap clothes.
C．Her shopping is often ’based on need.
D．They listen to advice but never take it.
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