—I can never forget the days we spent together in the summer camp.—Well, especially the day it suddenly began to rain in the middle of the night.
Green products are becoming more and more popular because they are environmentally _________.
—The sports meeting is due to be held next Monday. —_________ it rains? —Try to put it off.
Health problems are closely connected with bad eating habits and a _________ of exercise.
She was chosen to be the first secretary of the state government and has regular and immediate _________ to the president.
Washington, a state in the United States, was named _________ one of the greatest American presidents.