问题描述：
How many people will there be on the earth 100 years from?同义句转换
How many people will there be on the earth___ 100____?
还有They needed a horse to get to another city in the old days.同义句转换
A horse ____ ____ to get to another city in the old days.
How many people will there be on the earth___ 100____?
还有They needed a horse to get to another city in the old days.同义句转换
A horse ____ ____ to get to another city in the old days.
问题解答：
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