he clear colorless liquid that fallsas rain, fills lake and rivers, and is necessary for life to exist is______.

You don’t go to that cinema quite often, do you?—— No, I only go there ______ because it’s too far away from my house

There greatchanges in our city in the past 10 years.

_________ nice trip to travel by air!—__________.

Tu Youyou is famous ____ her medical research and won the Nobel Prize this year.