单项选择题

When can exhibitor expect to get an answer

A．Within a month or two.
B．By Tuesday.
C．Very soon.
D．Immediately.
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Though it is difficult to remember now, this was not always the case. In the 1st paragraph, this sentence suggests that ______.
A．today Google has become a commonplace way to find information online
B．Google made a great contribution to searching online
C．Google changed a lot
D．Google is different from other search engines
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As to the issue of drug approval, ______.
A．to judge whether a drug is safe enough should rely on objective measures
B．drug companies usually study for years to prove the safety and effectiveness of a drug
C．drug companies prefer surrogate endpoints in the process of drug approval because F.D.A.encourages them to do so
D．drug companies rely heavily on surrogated endpoints because this way of measurement takes less time and money
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