第27题: [单项选择]地震是由( )引起的。 A. 滑坡 B. 水土流失 C. 地壳断裂 D. 岩溶 参考答案:C
第28题: [单项选择]You don't have to ______ yourself. I think you did the right thing putting your mother in a nursing home. A. justify B. hinder C. indulge D. appoint 参考答案:A 答案解析:justify证明……正当,为……辩护;hinder阻碍;indulge纵容;appoint指定