单项选择题

Why did Alfred Nobel invent dynamite

A．To defeat enemies.
B．To earn more money
C．To improve the peacetime industries of mining and road building.
D．To replace the old explosive.
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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.
单项选择题
Why is Roy worrying about his reputation for punctuality
A．He is a very lazy person.
B．He is always stuck in traffic jams.
C．He has been late for almost all his appointments today.
D．He doesn't want to keep people waiting for him.
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