If Mr. Brown _____ his sister to attend the party, she will certainly be glad to.
_____ 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.