He is one of the cleverest students ________ hard work was paid in the end.

Go about your business your own way. Don’t _____what others think or say. [ ]

__the problem, he wouldn’t havecommitted those mistakes

___the population of Shandong Province—I can’t say exactly, but I know it ________ about 80 million

you meet me at the airport–I’d like to, but I’m afraid I_________ avery important meeting when you return.