题目

根据句子意思，用括号中所给词的正确形式填空，每空填一词。 1.    Can scientists develop ________(taste) food than that on the earth? 2.    If young people can live ___________(health), their parents will feel very happy. 3.    All the students here suggested ____________(iron) shirts for their fathers every week. 4.    He has failed eight times, and has decided to try a _____________ (nine ) time.李阿姨在农贸市场买了7.5千克黄瓜，付给售货员12元，找回0.75元．每千克黄瓜多少元？