第20题: [单项选择]There has been some _________of entry into American schools to Chinese students. A. limit B. restriction C. confine D. imprisonment 参考答案:B 答案解析:本题考查名词的词义。limit意为“界限,限度”;restriction意为“限制,约束”;confine意为“界限,边界”;imprisonment意为“关押”。该句意为:中国学生去美国学校存在一些