英语：按要求改写下列句子
1、（An accident ）will happen if you drive carelessly.对括号内部分进行提问
（ ）（ ）happen if you drive carelessly?
2、If you keep practicing,you will improve your English.改写同义句
（ ）practicing,（ ）you will improve your English.
3、I must leave right now,or I‘ll be late for the meeting.用if条件句改写句子
（ ）I（ ）（ ）right now,I will be late for the meeting.
4、I get an invitation,I’ll go to the Party.用if连接两个句子
I( )（ ）（ ）the Party if I ( )an invitation.