People in Nome all had diphtheria, a disease that spreads very fast. If ________, it would produce a powerful poison that would kill the patient.
--Do you remember ____ he came? --Yes, I do.He came by car.
He ____ his home for a week.
--What’s ___ population of China? --China has ____ population of 1.5 billion.
--what do you think of the film? ---_____?
Is ____ dangerous to swim in the river alone?