The reason why he failed is ______ he was too careless.
I really ______ whether we win or lose.
You’ve done much of the work, and please leave ______ to us.
Don’t ______ a person only because he has failed in an examination.
Though we spent a lot, we think it _____ because we succeeded in the end.
What he said at the meeting means _______ those who had cut down the forests.