FOR vs. SINCE

It was her 78th birthday last year, and .................. then she has stopped   baking all the cakes herself.

• FOR
• SINCE

She’s been baking cakes .................. years.

• FOR
• SINCE

It’s three years .................. I did any skating.

• FOR
• SINCE

I haven’t done any skating .................. three years.

• FOR
• SINCE

I haven’t had a good talk ................ we met.

• FOR 
• SINCE

We’ve always talked ............... hours.

• FOR
• SINCE

They haven’t had a holiday ................. years.

• FOR
• SINCE

They have worked in the same office ............. 1999. 

• FOR
• SINCE