The Smithsonian National Air and Space Museum has the largest collection of historic air and spacecraft in the world. The museum features 22 exhibition galleries, displaying hundreds of artifacts(人工制品) including the original Wright 1903 Flyer, the "Spirit of St. Louis," and the Apollo 11 command module. It is the most visited museum in the world and appeals to all ages. You won't regret visiting the museum. Many of the exhibits are interactive and great for kids.

Phone: (202) 357-2700.

Museum Hours: Open daily except December 25.

　　Regular hours are 10:00 a.m. to 5:30 p.m.

Official Website: www.nasm.si.edu

Location:

　　The museum is located on the National Mall at Independence Ave. at 7th St. SW, Washington, DC. The best way to get to the museum is the subway. The closest subway stations are Smithsonian and L' Enfant Plaza. Or taking the bus is also convenient. However, you may be caught in traffic jams while driving.

What to See and Do at the Museum

　　You can ride in several 4-minute flight simulator(模拟装置) rides. Take a journey through space or to natural and manmade wonders of the world at the Lockheed Martin IMAX Theater. Watch a film through a five-story-high screen with six-channel digital surround sound. Take a 20-minute tour of the universe at the Albert Einstein Planetarium with its high tech dual(双重的) digital projection system. Shows often sell out, so purchase your tickets before viewing the rest of the museum. Tickets can be purchased in advance at (877) WDC-IMAX.

Visiting Tips

▲This is one of the busiest Washington DC museums. Arrive early in the morning or late in the afternoon to avoid crowds.

▲Purchase IMAX or Planetarium tickets in advance or as soon as you arrive.

▲Allow at least 2-3 hours to explore the exhibits.

21. What do you know about the Smithsonian National Air and Space Museum?

A. It is a museum worth a visit.

B. It is specially designed for kids.

C. It is the largest space museum in the world.

D. It records the development of the world space industry.

22. If you want to visit the Museum, you ________.

A. can go on any day of the year

B. should book online in advance

C. had better take public transportation

D. aren't allowed to take mobile phones in

23. Visitors are advised to _______.

A. manage their visiting time properly

B. spare little to explore the artifacts

C. choose a food court-style restaurant to eat

D. know the do's and don'ts

　　In many-even most-space-themed films, whenever Earth faces a disaster, the solution is always leaving the planet in spaceships. But the latest Chinese sci-fi movie, "The Wandering Earth", offers a different idea.

In the film, which is adapted from a short story by Chinese sci-fi writer Liu Cixin, Earth is in