单选题 In recent years there has been a ______ increase in the cost of living; many families have to depend on the federal aids.
【正确答案】 C
【答案解析】[解析] C项“significant重大的,值得注意的”符合题意。其他三项“A项ponderous沉重的,冗长的,沉闷的;B项powerful强大的;D项violent猛烈的,激烈的”都不正确。本题的空格处是说生活费大幅增长。因此C项为正确答案。