下列每个句子中均有一处错误。请按要求将每个句子中的错误找出来并加以改正。 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，并在该词的下面写出修改后的词。 注意：1.每处错误及其修改均仅限一词。 2.每句只有一处错误。 小题1:After checking all the lights were turned off and that all the window were closed,the old man went home. 小题2:I don’t know this city at all.This is the first time I come here. 小题3:What an important advice the manager gave us the other day! 小题4:He didn’t make clear when and where the meeting would be held. 小题5:The students must get the blackboard cleaning before class. 小题6:There are more than one boy in our class from the country town. 小题7:All the people in my family loved the  apartment for the moment we saw it. 小题8:After graduation from the key university,Tom went abroad for his further education. 小题9:As we know,this is a properly way for us to learn a foreign language. 小题10:It is true that the number of people studying English in China is increasing rapid.