单项选择题

Why was Roy late for the appointment

A．There are too many cars in the street.
B．He went out too late.
C．He forgot the time.
D．He did not know which person he should go to meet first.
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单项选择题
What happened on October21, 1833
A．Alfred Nobel invented dynamite.
B．Alfred moved to Russia.
C．Alfred was born in Stockholm.
D．Alfred died in a foreign country.
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We can infer from the passage that _________.
A．the company producing these drugs are going to pull from the market all their products.
B．customers don't know the results of the trail.
C．doctors are strongly against using these drugs on their patients.
D．researchers are worried about the adverse events of these drugs.
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