A study ________ in the USA in 1977 showed that the chemical ASA in aspirin could prevent a stroke.
Only when he returned home ______ what had happened.
He was fortunate ____ he did not get injured in the car accident.
He hasn’t decided _____ he will go abroad next year.
The old man turned his business over to his younger son, ________made his elder son discouraged.
Stand _____ you are, and I will come and help you.