单项选择题

AIDs activists permanently changed and shortened America' s ______ process fortes ting and approving new drugs of all kinds, for all diseases.

A．stagnant
B．intricate
C．appropriate
D．efficient
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单项选择题
Although Kerry has had no formal education, he is one of the ______ businessmen in the company.
A．alertest
B．sternest
C．nastiest
D．shrewdest
单项选择题
Wireless waste from cell phones, pocket PCs, and music players ______ special problems because they have toxic chemicals in batteries and other components.
A．pose
B．commit
C．transport
D．expose
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