【2015·安徽】______ the difference between the two research findings will be one of the worst mistakes you make.
It is by no means clear the president can do to end the strike.
(年北京市西城区高三5月二模试题)31. A person who has never tasted bitter won’t know ______ sweet is.
It suddenly occurred to him he had left his keys in the office.
(年北京市西城区高三5月二模试题)23. It’s been discovered in the study ______ people are more relieved after forgiving others.
The last time we had great fun was _____ we were visiting the Water Park.