大家要帮帮我啊！~一定啊！我的命就掌握在你们手上了！

为什么有这么多人搞"翻译",呵呵,楼主要的是改错嘛

根据高中改错只改一处的原则,我只能这么改.

第一题,受楼下指点,将could改为is为正解
Why does she look so happy?
It is because she won the writing competition

第二题,楼上改为not anything,本人没见过这种改法,我认为把nothing改为none是对的.nothing用于回答what,答none回答how many ,how much
.-How many replies have you got?
-none

第三题,改为a problem of the teenagers是正确的,不过高中改错题不允许改动这么多的,我认为改为"teenagers'"是正确的,注意那个"'"
3.How to spend time wisely is a teenagers' problem

应改为:
1.-Why does she look so happy?
-It is because she won the writing competition.
应将第二句中的could改为is,因为because是连词，在这里应该是引导一个从句，单独一个情态动词后不可能跟一个从句，所以将cculd改为is，那么because在这里引导的是一个表语从句。意思是：她为什么看起来那么高兴？那是因为她获得了这次写作比赛的胜利。
2.-How many replies have you got?
-None.
应该将nothing改为none，因为回答How many 提问的句子，表示“一个也没有”时，应该用None更合适。这段对话的意思是：你已经收到多少封回信了？一封也没有。
3.How to spend time wisely is a teenagers' problem.
应该将a teenagers proble