请问abcd哪里错?怎么改?1.There used to have few tall buildings around

请问abcd哪里错?怎么改?
1.There used to have few tall buildings around my village.
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a b c d
2.People say that the world's populations may be seven billion
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by the year 2010.
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3.What's the time in your watch?It says half past twelve.
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