题目

完形填空；从A、B、C、D四个选项中选出能填入空白处的最佳答案。Mr. Clark works in a middle school. He likes reading and often­   1   some books from the library. He listens to the radio every morning and reading­   2  after supper. So he knows much and teaches well. His   3  worship(崇拜)him very much. Mike, Mr. Clark’s little son, is only nine. He also likes books. And he often asks his father some questions. Mr. Clark always thinks the boy is too  4    to understand and chooses   5   ones to answer. Of course the boy is not satisfied with(对设复数，（Ⅰ）若是实数，求的值；   （Ⅱ）若对应的点位于复平面第四象限，求的取值范围．