A
The National Air and Space Museum in Washington D．C． has thousands of objects on display， including the 1903 Wright Flyer，Charles Lindbergh's Spirit of St．Louis，the Apollo 11 Command Module Columbia，and a lunar rock you can touch．In addition to our exhibition galleries，you may want to visit the Albert Einstein Planetarium，Lockheed Martin IMAX Theater，and the Public Observatory on the east end．There are many things to do at the Museum in D．C．We offer daily tours and educational activities for both children and adults．We also have scheduled lectures and events throughout the year．
Hours and Admission： Open every day except December 25．Admission is free．
Regular Hours：10：00 am to 5：30pm
Extended Hours：10：00 am to 7：30pm
December 26-30，2014．
March 30-April 20，2015．
Fridays and Saturdays，April 24-May 16，2015．
May 17-September 7，2015
Visiting Tips：
Limit the number of Bags：All visitors are screened through metal detector upon entry． The fewer items you bring inside the Museum， the faster your entry． Before you visit， please review the list of prohibited items，which include pocket knives and tripods（三脚架）．Visitors carrying prohibited items will not be allowed inside the Museum， so please leave them at home or in your car．
No Food or Drink：Only bottled water is permitted in the Museum．You may only consume food and other drinks in the Food and Drink Court，not in the Museum．Groups who bring food are encouraged to picnic on the National Hall．
Please Take Photos：You are welcome to take photos for personal use．However，tripods and monopods（单脚架）are not permitted without approval．
First Aid：The Museum has a First Aid office and a nurse on duty．Please contact the nearest security officer or the Welcome Center for assistance．
Visit the Welcome Center： At our Welcome Center in the South Lobby， staff and volunteers can answer any questions you have during your visit．
Open：10：00am to 5：30pm
Phone：202-633-2214
E-mail：NASM-Visitor Services@si．edu
21. According to the passage，the National Air and Space Museum is a museum ______ ．
A. where only adults can take part in some educational activities
B. where one can touch anything he likes
C. everyone can pay a visit to without buying tickets
D. everyone can visit without time limit all the year round．
22. If the Greens plan to visit the Musuem at 6：00pm， it is accessible on ______ ．
A. December 24， 2014（Wednesday） B. March 1， 2015（Sunday）
C. September 15， 2015（Tuesday） D. July 6， 2015（Monday）
23. A visitor to the Museum can ______ ．
A. get some medical treatment if he suddenly falls ill
B. take photos with tripods for personal use
C. bring fewer bags to go through metal detectors
D. eat and drink in the Museum or in the Food Court
24. The purpose of this passage is to ______ ．
A. attract people to explore the universe
B. make an advertisement for the Museum
C. encourage adults to bring their children there
D. show what is on display in the Museum
