帮帮忙中译英（请不要用软件翻译，谢谢）。 就4句，谢谢
1.他们学校的学生比你们学校多吗?
2.他们两个月前建造的那座桥是湘河上最长的桥.
3.如果你替我报名参加(enter for)汽车赛,我只好去了.
4.他的哥哥参军前在这里工作过两年,是吗?
参考答案:Is the students in their school more than that of your school?
The bridge they built two months ago is the longest bridge in Xiang River.
If you entered for the car race for me, I can do nothing but go.
His elder brother had worked here for two years before joining the Army, hadn't he?