判断下列句子是对还是错，对的在句后的空框中打钩，错的打叉。1

1.Quotation marks are used to enclose the exact words of a writer or speaker。√

解释：引号是用来表示原话的。

2.The names of books，magazines，pamphlets，and newspapers may be underscored or enclosed in quotation marks. ×

解释：在用电脑打字时，书名、杂志名、小册子名和报纸名等都用斜体字;而文章名等则用引号括在里面。在用老式机械打字机打字时，由于键盘上没有斜体字，书名、杂志名、小册子名和报纸名等则要下划线。

3.Periods and eom~las are always placed inside closing quotation marks.√

解释：在美国英语中是这样的用法。

4.Parentheses are used by a writer t0 enclose his own remarks inserted into a quotation. ×

解释：请参见圆括号的用法。

5.A quotation within a quotation is shown with a single quotation mark. √

解释：一般在已用双引号的引文中再用引文则要用单引号。

6.To show the plural form of a number，use the apostrophe mark followed by an s 。√

解释：正确。例如：in the 90’S(在90年代)

7.On a typewriter the underscore is used to emphasize words that would be italicized in printed copy. √

解释：在打字机上面要强调一个词则给它下划线。

8.An introductory phrase or clause should be separated by a comma from the main clause，SO as to avoid confusion in meaning. √

9.The word sic is used to show that a quotation is free of errors. ×

解释：sic是拉丁文.意为“原文如此”。

10.A single quotation mark is typed by using the apostrophe key. √

解释：在美国英语中，双引号中要再用引语必须用单引号。