A- how long has he been worked for the BBC ? 
 - He has been worked for the BBC a couple of years / since the arrival of he new manager 
B- Since when Ben know Jerry ? 
-Ben know Jerry since they were kids / a long time ago 
C- je comprend pas cette phrase dsl
D- I got up before your last conversation since 95 minutes 
F- since when B.Obama is the president ?
- B.Obama is the president since 2008 / for six years