单项选择题

What is the main idea of the story

A．The local Africans are peace-loving people.
B．Soda bottles are very precious in some remote areas.
C．A trivial thing may sometimes bring about undesirable consequences.
D．Caution must be taken in introducing new technology.
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The first Asian country holding Olympics______.
单项选择题
How do commuters respond to plans for the future of the ferry
A．Many welcome the idea of having more bars on board.
B．Many prefer the ferry to maintain its present speed.
C．Some suggest improving the design of the deck.
D．Some object to using larger luxury boats.
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