The poor mother    when she heard the news that her only son had been killed by the enemies.

---May I look at the menu for a little while?---Of course, ______ sir.

There is no doubt that the increase in demand _____ the rise in prices.

—The Libya issue calls for talks. —Quite right. I would rather the UN ________ something immediately.

Mr.Morse，who graduated from a famous medical university，spent years ______ his skills as a doctor.