我爸不太负责任，我妈和两个弟弟（我弟8岁我21）我该担起这个家来吗？

于情于理，你也应该担起家庭的担子，但是你弟弟的生活费、教育费、医疗费等费用可以向你父亲要，如果你父亲不给，就你母亲以你弟弟的名义起诉你父亲，让他拿钱。

知道对不对
1. my younger brother spent 3 hours doing his homework yesterday
it took my younger brother 3 hours to do his homework yesterday. it takes me 45 minutes to go from my home to school by bike every day.
4. there are about 425 students in grade nine.
5. her home is 3 miles away from the supermarket. his mother go to work by undergrouond every day
his mother take the unde ground to work every day
3.
2

我分析了下 可能1.平时做题一般都是当天老师讲过的内容，考试会比较综合。2.知识应用不够灵活，建议多做题。3.考试心理素质不够好，发挥不出来