阅读理解 Thanksgiving Day in the United States started as a way of giving thanks to a good harvest.It falls on the fourth Thursday of November.The origin of the modern Thanksgiving Day is the harvest celebration in Plymouth,Massachusetts in 1621.Early Thanksgiving took the form of a special church service,rather than a feast,as is common now.George Washington announced the first national Thanksgiving Day in 1789. Since 1863,Thanksgiving Day has been a yearly holiday in the United States.A more recent tradition started in 1947.Since then,we often see on television the President pardoning the turkey. It is traditional for families and friends to get together for a large meal with a turkey,potatoes and other seasonal vegetables.Many of these foods are native to America and were not available in Europe when Europeans first settled in America. Thanksgiving Day parades are held in some cities and towns of the US.Many football games are played and watching them is a popular activity.Some people have a fourday holiday so it is a popular time for trips out of town and to visit friends and relatives. Most government offices,schools and other organisations are closed.Many offices and businesses allow staff to have a fourday holiday.Public transportation systems do not usually operate on their regular timetables.It is one of the busiest periods for travel.This can cause over crowding.Parades and football games can cause problems to the local traffic,so some states have an extra day for the Thanksgiving holiday,known as Thanksgiving Friday. 1.When did Thanksgiving Day become a yearly national holiday? A．In 1621. B．In 1789. C．In 1863. D．In 1947. 2. What may an American do during the Thanksgiving holiday?____ a．Take part in parades.  b．Watch football games. c．Go travelling abroad.  d．Go shopping. e．Have a family gettogether. A．a,b,c B．a,d,e C．a,b,e D．b,d,e 3. What can be inferred from the last paragraph?____ A．Many people can't have a fourday holiday because of their busy work. B．The activities of Thanksgiving Day may cause people trouble. C．All businesses will open on the Friday after Thanksgiving Day. D．Thanksgiving Friday will be held in more states for extra pleasure. 4. What does the text tell us about the gettogether meal of Thanksgiving Day?____ A．It needn't be a big feast. B．Many foods are native to Europe. C．Turkey is not allowed to be eaten on this day. D．It includes many seasonal foods. 5. Which is the BEST title for the text? A．The Origin of Thanksgiving Day B．Celebrations of Thanksgiving Day C．Thanksgiving Day in the United States D．Presidents and Thanksgiving Day