—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.
While______ in Scotland, he made friends with the native there.
--- Have you really been to visit the Bird’s Nest in Beijing? ---- I ______ it last summer vacation.
Ten minutes had been made full ____ of ____ the problem.
These flowers are pleasant to ______.
Tom’s dog became ill and died,____ made him very lonely.