-- _____is that used for?---_____ the floor.
The first time I ________ here, it was the year of 1980; this is the third time that I _________ to Chongqing.
_______ the difficulty that he has supporting his big family, he still makes every effort to realize his dream, which I believe is __________ his reach.
The government has raised the tax on urban building (房产税) with the ______ of controlling the price of buildings.
It is the photo we took years ago __________ we were at university_________ often calls up my memories of my college life.
—Would you come to our home for a chat right now?—Cool, _________.