I had promised to send him an email_______ I got home but I was so busy that I forgot to do so .
_____ the 2000 Olympic Games will be held in Beijing is not known yet.
What the doctors really doubt is _____my mother will recover from the serious disease soon.
_____we’ll go camping tomorrow depends on the weather.
Does _______ matter if he can't finish the job on time?
I hate _____when people talk with their mouths full.