Don’t you know that Australia was, as a matter of fact, _________ used to be a nation of prisoners!
Maybe you have been to many countries , but nowhere else ___such a beautiful palace.
I failed in the examination last term and only then ____ the importance of studies.
Only when your identity has been checked ,.
The old couple married for 40 years and never once____ with each other.
—How was the 2008 Beijing Olympic opening ceremony? —________ that the whole world was attracted.