连词成句，注意单词的大小写及标点符号。

1. your, what, head, to, happened (?)

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2. a, we, watermelon, bought, so (.)

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3. watermelon, Sam, the, carried, bikc ,the, on (.)

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4. his, then, fell, Sam, bike, off (. )

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通常，中餐宴会中中档宴会每桌占地面积为（）平米，高档宴会每桌占地面积为（）平米。