_____ is the population of your country?

29. I have been absent for nearly half a month. I can't afford ________ week.

There is a subway in my hometown, but ________ existed two years ago.

 — It is a pity that we have nothing to refer to when we come across new words.— I quite agree with you. There isn't any dictionary around when we need ______.

He was very rude to the Customs officer, _____ of course made things even worse.