When they got to the South Pole, they found the Norwegians had ____ them in the race to be the first ever to reach it.

Warm­blooded animals live an active life even in freezing winter，which helps them to ________ their normal body temperature.

While living in a foreign country, one______ a special dish from home now and then.

He goes back home to see his parents ______ few weeks.

Ever since he caught the N1H1, Peter _____ so much pain that he is coughing day and night.