is known to  us all is that America is a developed country         _________the First World.

With the development of modern science and technology you can take your favourite radioprogrammes with you on the move and listen     you like．     

Part of the reason Charles Dickens loved his own novel, David Copperfield, was ______ it was rather closely modeled on his own life.

During the reconstruction of the city, many modern tall buildings went up ______ old shabby houses were torn down.

 At the beginning of a speech, it is very important to grab the audience’s attention and make them interested in     ________you have to say.