Question

仔细阅读下面的短文，短文中有10个空格。请根据语境或按照括号内的具体要求完成语法填空。

　　The fax has greatly changed office work, especially in China．When you place a sheet of paper in a fax machine, the machine“reads”the writing on the page and changes the shapes of letters 　　1　　 electronic signals．It then sends these signals down an ordinary telephone line to another fax machine, 　　2　　 changes the signals back into the shapes of letters．You can imagine 　　3　　 useful this is, particularly in 　　4　　 like China and Japan, which use written characters not letters．It is also useful for sending pictures, designs, maps and so on．

　　Sending a fax is more expensive than 　　5　　(post)a letter, but much quicker．For example, you can send information abroad immediately, but mailing a letter might 　　6　　 a week or so．　　7　　(连词)you want to send a letter to an office abroad that is in a different time zone, you can send a fax, and it will 　　8　　(receive)even though the office is not open．There are two other points to consider．First, remember that a fax can be read by anyone, so be 　　9　　(care)what you send!Second, do not start faxing everything!It is much cheaper to post or email a long report 　　10　　 to fax it．

Answer 1

答案：
解析：

　　1．into　与前面的changed构成词组change sth．into sth．。

　　2．which　把信号重新转换为字母的是前面提到的fax machine，所以逗号后面的句子是一个非限制性定语从句，用which引导。

　　3．how　imagine接的是一个宾语从句，只有how后面才能接形容词引导这类从句。

　　4．countries　空后的China和Japan是“国家”。

　　5．posting　与作主语的动名词短语sending a fax对应。

　　6．take　“某事要花多长时间”的动词要用take。

　　7．If　此处的从句是后面主句情况出现的条件。

　　8．be received　a fax是被人接收的，所以用被动语态。

　　9．careful　be是系动词，后面接形容词作表语。

　　10．than　连接两个不定式短语构成比较结构。