The map is one of the best tools a man has __ he goes to a new place.
The World Trade Organization (WTO) finally opened its door to China on November 10, ______ our Chinese 15-year wait.
He said it was _____ impossible to buy the novel which was _____ worth reading.
It is thought that one billion people in the world, _______is half the word’s workers, earn their living by farming.
I wonder ______ you were doing last night.
______ won’t be long ______ National Day comes.