单句改错 (共10小题；每小题1分，满分10分)
下面每句中都有一处错误。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：每处错误及其修改均仅限一词；
【小题1】The police is investigating (调查) the cause of the accident.
【小题2】It’s quite difficult to find who’s responsible of pollution.
【小题3】That’s why I want to find out.
【小题4】Here is the book written by him of lots of pictures in it.
【小题5】That sounds like a great idea.
【小题6】There are five for you to choose . You can choose one of them.
【小题7】Please dial this number if you want any farther information.
【小题8】The solution of the problem was helpful.
【小题9】He apologised his teacher by writing him a letter.
【小题10】He passed the English test, it really surprised his teachers.is---are
网友回答
(答案→)is---are
解析：【小题1】police是集体名词，谓语动词通常用复数形式表示所有警察。
【小题2】对某人来所做某事如何，常用介词for。
【小题3】表语从句中缺少介词out的宾语，故用what。
【小题4】with的复合结构作定语修饰books。
【小题5】sound作系动词，直接接名词作表语。
【小题6】choose from表示在一定范围内进行选择。
【小题7】further指程度上更深的。
【小题8】solution、key等表示解决方案、关键，后接介词to。
【小题9】apologise to sb指向某人道歉。
【小题10】which引导非限制性定语从句，修饰前面整个句子。