第17题: [单项选择]The sounds we call words can be called a language only if ______. A. each sound has a different meaning B. each sound is different from the other C. there is a system of writing D. they have a structure or grammar 参考答案:D 答案解析:由最后一段前两句话可以知道:一种语言不仅仅是词语的集合,它还必须具有一定的结构或者说是语法。
A. turn out B. turn to C. turn down D. turn over 参考答案:D 答案解析:[解析] A.turn out结果,最终是……;B.turn to向……求助;C.turn down拒绝;D.turn over交出,让出移交,转换。根据题意D为正确答案。句意为:战争失败迫使法国在1