Complete the second sentence so that it has the same meaning as the first one. Use no more than four word

Complete the second sentence so that it has the same meaning as the first one.Use no more than four word
1.Mr Hung began/started to work / working for the company ten year ago
--> Mr hung has...the company for ten years
2.Na said,"Let's keep sheets with single printed page for drafting ".
--> Na suggested that...with single printed page for drafting
3.Swimming makes people strong.It is a good sport
--> Swimming,... Sport,makes people strong
4.Nam is poor,so he won't travel around the world
--> If...,he would travel around the world
--> Unless...,he would travel around the world