A. which they have B. that having C. that have D. where have 参考答案:C 答案解析:定语从句。据报道，在失业率高的地区最容易发生犯罪。▲that在定语从句中作主语，其先行词是cities。虽然where能修饰cities，但它不能在从句中作主语。
第24题: [单项选择]At the end of one month, the boys (looked forward to) their mother's (return) most earnestly, (as) they were really (tired with) their father's boiled eggs. A. looked forward to B. return C. as D. tired with 参考答案:D 答案解析:应改为tired of．Be tired of为固定搭配：对…厌倦，不用with．
