根据课文内容选词填空。

             thick      soft        hot         hear       blind      elephant        hard

    It is a____ day. Four men are under a tree. They are all ____ . They cannot see. Then they ____  a noise. Oh, it's an____ . They touch the elephant. One touches its ear, he thinks the elephant is____ . One touches its tooth, he thinks it's ____ . One touches its tail, he thinks it's thin. One touches its leg, he thinks it's ____ . How funny!

读词语，把音节补充完整，并标上声调。

—Wait ________ minute. I'll finish my work first.

德国鲁尔区从20世纪60年代到80年代，对经济结构进行了大规模的调整，结合鲁尔区产值结构图（图中①②分别表示1958年和1995年的产值结构）及所学知识，回答下列问题。