You will be late for school _____ you don’t hurry.
Some researchers are finding that daydreaming may be important to mental health .Daydreaming ,they say, is good means of relaxation.
—I am so angry that I could blow my top! —Oh, dear, _______. What’s wrong?
Some scientists believe that it won’t be long _______ robots are widely used in all walks of life.
Under no circumstances _______ the difficulties when they were on an expedition to the Antarctic.
In the city, I saw so grand a National Day celebration _______ I never dreamed of.