单项选择题

______ ago, there were few people in the world.

[A] Thousand (一千，成千上万) years
B. Thousands of years
C. Thousand of years
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The trousers (裤子) ______ too short for me. Please show me some others.
A． is
B． are
C． were
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In England, which is ______, beef, pork or milk
A． the cheapest
B． cheaper
C． cheap
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