It’s high time that we gave ______ attention to our world climate and led a low-carbon life, or the consequence would be too serious for us to face.
—I’m changing my major.—_______?—Journalism.
Two or three years ago this kind of glasses _______ a favorite for some time, but now it _______.
I’m surprised to see you are a chain smoker. You _______ , I remember.
After ten years of hard work, the Browns _______ all their debts.
_______ is known to us is that time is limited and precious.