I have problem.My friend phone cannot support mp4 but support 3gp so.how to change mp4 format to 3gp?

i have no problem! I have a store throat =I have some problem with my throat “ problem ”写错了，应为“ problems” I must have a problem no money no friends one problem大神们帮帮忙my money is gone,my friends lied to me,my problem is i have no trust in one... .My problem is that I don't have much time to do the I don't have _______ doing my homework.A.problem B.problems选择A还是B I have some problem (finish) my homeworkfinish 应该用什么形式 MY teacher and i have a lot of mutual understanding about this problem 英译汉：my teacher and i have a lot of mutual understanding towards shin problem. You don't have an attitude problem,is my problem Please help me with my problem!Hurry!I think I have a problem,I want you to help me.What does 易拉罐 means?Please in English.Ok? 16.My American friend knows my problem because I ( ) my ideas with him.A、 have changed B、 changed C、 have exchanged D、 exchanged 16.My American friend knows my problem because I ( ) my ideas with him.(本题分数:1 分.)A、 have changedB、 changed C、 have exchangedD、 exchanged 我的问题是：I have no problem I have a mental problem.什么意思? I have a problem __ this watch. No problem.when i have some free How do I deal with my problem?