Nowadays, many people walk to work______ Copenhagen Conference calling for living a low—carbon lifestyle to cope with global warming.
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.
海南三亚一中月考3,24)So difficult _______it to work out the problem that I decided to ask Tom for some advice.