People in Nome all had diphtheria, a disease that spreads very fast. If ________, it would produce a powerful poison that would kill the patient.
He is a student at Oxford University, ____for a degree in computer science.
If it ______________ tomorrow, I would stay at home watching TV.
Each time ________ they met, they would talk long hours together.
Though ______ _money, his parents managed to send him to a key university.
In time of serious accidents, ________ we know some basic things about first aid, we can save lives.