The young boy has come to himself in hospital now. But he ___ unconscious for three days.
—I'm going to travel along the Mekong River next week.—______________.
After working for two hours, I found impossible to complete the paper in time.
Although ________ to stop, he kept on working
Was_______ John’s quick action and knowledge of first aid ________ saved her life?
Only after you have reached eighteen _______ the army.