In the story,a dream is very important to different characters,who have all kinds of dreams and dreams also give them different motives.Dreams seem more important to those people who are living in a lower class.It makes poor workers face the difficulty and meet the future because they believe that hard work makes a difference and someday,their dreams will come true.
分析：
1.Dream是个可数名词,对于可数名词有两种情况@1 冠词+名词单数 @2名词复数；所以,a dream 或dreams
2.all kinds of 各种各样的；意思与different重复,故择其一而用之.
3.在某个社会阶层,多用介词In
4.Keep doing sth.Make sb do.