It will be 2 years _______ we see each other again.

--- Would you come back to have dinner with us this evening? --- I’d love to, ______ I have an important meeting . 

 ---          is the pen?          --- It’s black        red.

---_______does your mother watch the Talk show? ---Once a week.

I really enjoyed your lecture, ______ there were some parts I didn’t quite understand.