What is the most popular food in western countries? If you are not sure, statistics might give you the answer.
Every year，some 20 million people walk into restaurants and buy 2 billion sandwiches. Americans alone eat more than 1 billion sandwiches annually. If you lined up all the sandwiches Westerners eat in a year, they would go around the world 13 times!
When John Montagu made the very first sandwich in England in 1762, he couldn't have imagined that it would still be very popular almost 250 years later. There  is  a  campaign  starting this month in the  US to find the healthiest  and best tasting sandwich  in the country.
Sandwiches are commonly carried to school or work in lunch boxes or brown paper bags to be eaten  for lunch. They are also taken on picnics and hiking  trips. Their longlasting popularity lies in their convenience and fast preparation time.
You can put everything you want inside a sandwich. They are easy to clean up after, nutritious and come in hundreds of different kinds.
Wellknown American chef Dave Lieberman adds  another reason.“I think people like to touch their food,  kids especially. It's just a natural instinct. You don't  have to use a knife and fork to eat a sandwich，” he  said.
Sandwiches can be hot or cold with almost any  kind of filling. One of the most popular kinds is the  BLT—bacon，lettuce and tomato. Although it is a simple food, it can still be creative. Sandwiches can be   served openfaced, with sushi inside or grilled with delicious fillings.
The author intends to________.

A．tell us the history of sandwichmaking

B．introduce a popular food in the West

C．show how sandwiches are made

D．explain why westerners like sandwiches

What is the main reason for the popularity of sandwiches?

A．They are healthy and delicious.

B．They have a history of about 250 years.

C．They are fast and convenient.

D．They can be served either hot and cold.

Which of the following statements is TRUE according to the text?

A．Sandwiches are usually eaten with a knife and fork.

B．Children don't like sandwiches so much as the adults.

C．Americans started a campaign against sandwiches.

D．People are trying to make sandwiches more nutritious.

What does the last paragraph mainly tell us?

A．There are many kinds of sandwiches.

B．The sandwich is a simple food.

C．The BLT is the most popular.

D．Sandwiches are mostly openfaced.