—Have your read the article A Dirty Beijing, which is about air pollution?—Yes. It’s highly informative. I _____no idea that the PM2.5 there sometimes reached 300.
____ many times, I could not remember her telephone number.
Mr. Johnson insisted that he _____ his debts, but nobody believed him.
If only I _____ a few days ago!Then I wouldn’t have been feeling so worried now.
_____ money, the man was very rich, but he was not happy at all.
Though _____ of the danger, he still went skating on the thin ice.