单选题 The Untied States and Canada are lands of ______ except for the Indians, who are the only true natives.
A. emigrants B. immigrants C. dwellers D. inhabitants

【正确答案】 B
【答案解析】[解析] 本题空格处是说美国和加拿大是移民国家。B项的“immigrants(外来)移民”符合题意。其他三项“emigrants移居外国者；dwellers居民；inhabitants居住者”都不正确。