—All the building materials have been washed away.—So I have heard. But there was no sign ____ a heavy rain was on the way last night.
Canada is a country ______many different nationalities as well as a country with foreign immigrants(移民) ______ most of its population.
Studies show that people are more______ to suffer from back problems if they always sit before computer screens for long hours.
— Are you in a hurry? —_______. I was supposed to be home an hour ago.
--Let’s have a game of tennis; the loser has to treat(请客) the other to an ice-cream. -- _______.
Chinese economy suffered a great loss from the May12 earthquake _____ the snow and ice storm in February, 2008. Which of the following is NOT right?