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阅读下面短文,判断句子是否正确｡
Hello,boys and girls.Let's play a guessing game.This is a kind of fruit.They're oval（椭圆形的）.They're yellow.They're prickly（多刺的）.What are they? Can you guess? Yes. They're pineapples. They are yummy. Pineapples are good for our health（健康）.