This is a difficult and stressful job, but one ______ you can really help people.
May 12th,2008 is a special day, _____, I think,that will be remembered by the Chinese forever.
The idea of protecting environment has been _____ a large extent accepted in this area.
I’m told that languagepractising.com is a free website _____ learners can not just learn various languages but also chat online.
Either you or any of your family ______ to attend the important banquet that is due tomorrow.
Tom,you and I could hardly work out the mathematic problem, _______?