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Planning a vacation is one activity your family is sure to enjoy as there are plenty of options to choose from. To help you decide, here are four of the best cities for family vacation.

Washington, DC

The nation's capital is a treasure place of fun, family activities that just happen to be rich with history. Start off exploring the National Mall and you'll find the Washington, Lincoln, and Jefferson monuments all within walking distance. Then there are the war memorials: Vietnam, Korean, and WWII.

Boston

Can't get enough US history? A trip to Boston just might be for you. Go back in time by taking a tour of the USS Constitution, aka Old Ironsides. From there, walk The Freedom Trail where you'll come across such landmarks as the site of the Boston Massacre, the Old North Church, Paul Revere's house, and the Bunker Hill Monument.

Los Angeles

There is always something to do in Los Angeles. For starters, enjoy a beach day on the miles and miles of coastline. Malibu, Redondo, Manhattan, Venice, and Hermosa are just a handful of sunny SoCal beaches. In need of some culture? Get your art and architecture on at The Getty Center, where admission is free though you do have to pay to park.

San Francisco

If Southern California isn't your speed, perhaps Northern California is. And San Francisco is a great place for a family to explore. Start by driving, or walking, across the Golden Gate Bridge. On the west side of the city is over 1,000 acres known as Golden Gate Park, home to gardens, trails, playgrounds and much more.

21. Which is suitable for you if you are interested in some late American presidents?

A. Washington, DC.      B. Boston.      C. Los Angeles.      D. San Francisco.

22. Where should you pay for parking?

A. The Bunker Hill Monument.      B. The Golden Gate Park.

C. The Getty Center.               D. The Freedom Trail.

23. What's the purpose of the text?

A. To tell us the history of four American cities.

B. To make a comparison of four American cities.

C. To provide guidance about travelling in the US.

D. To introduce four destinations for family vacation.