All of us are_____aware of the cause of this failure, so do not make the same mistake again.

I’m certain David’s told you his business trouble. ________, it’s no secret that he owes a lot of money to the bank..

   So far the young man hasn’t had any success; ______ he will keep trying.

I’d like to make use of ______ more time to consider my decision.

 ________ the machine begins to work, you can’t stop it _____.