第33题: [单项选择]In recent years there has been a ______ increase in the cost of living, many families have to depend on the federal aids. A. ponderous B. powerful C. significant D. violent 参考答案:C 答案解析:ponderous沉重的,冗长的,沉闷的;powerful强大的;significant重大的,值得注意的; violent猛烈的,激烈的。