With the word “PM2. 5” constantly __________ in media reports, you might be wondering what on earth it means.
Missing the flight means _______ for another three hours.
After I had finished eating, he advise me ______ immediately.
-----This returned Chinese scholar has become one of the top experts in this field. -----Yes, I know him very well. He _____ in Africa with wild animals for eight years.
All made possible for China to succeed in carrying on its reforms and open-door policy.
The pencil which you wrote just now me.