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
The destruction of the Twin Towers in New York City ______ shock and anger not only throughout America but also throughout the whole world.
A．enveloped
B．summoned
C．tempted
D．provoked
单项选择题
______ your request for a refund, we have referred that matter to our main office.
A．On the point of
B．With relationship to
C．In the event of
D．With regard to
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