---Why can't I smoke here? ---At no time__________ in the meeting-room
It’s a common sense _____ Canberra, _____ between Sydney and Melbourne, is the capital of Australia.
– I wonder how much you charge for your services. -- The first two are free________the third costs $30.
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, _______?