It is known to us that it was such great efforts _____________ all the Chinese athletes had made _________ helped them get 51 gold medals in the 2008 Beijing Olympic Games

Was it the belief _____

The president was so absorbed in his work that not a sound ______. [ ]

Who helped you clean the window, Jack-_______________. I cleaned it by myself.

Everything is so expensive now.It is hardly ___ to save money.