The more ______ we take the safety standards, the further we can speed up the development of the school bus industry.

 David has a big house, which ____ eight rooms. 

—You’ve been silent the whole day, man!— I’m feeling ______ blue today. I didn’t do well in the speech contest.

Though Shakespeare has long gone, his powerful ideas still undoubtedly ________ the western society.

Going into a supermarket without a clear list, you might       picking up what you wouldn't necessarily want．