Hospital staff burst into cheers after doctors completed a 20-hour operation to have _______one-year-old twins at the head.

Do you think Peter is free today?—I don’t think so. Recently he bas been _______ the most of his time to prepare for the final examinations.

don’t like to ask people for help as a rule but I wonder if you could ______ me a favour.

________, the northerners like noodles while the southerners are fond of rice in China

It is useful to be able to predict the extent _____ a price change willaffect supply and demand