写作训练：American Sandwiches

Sandwiches are most Americans'favourite food，especially children's．Just two pieces of bread with tomatoes，turkey，cheese or some other things in between．Sandwiches can be often seen in most American menus，because they are easy to make， easy to take，cheap to have and full of changes in between． People can buy them conveniently，in supermarkets or corner shops．All kinds of bread can be made into sandwiches．Usually we eat cold sandwiches，but Americans like to eat hot sandwiches！When Americans are busy with theirwork，or have some urgent things to do， they buy a sandwich．They work and eat in their offices．It saves them much time so that they can do their work faster．