PlayingtouristinLondon？Thesearesomeofthecity'sfinestandfreemuseumsandgalleries．
1．BritishMuseum
TheBritishMuseumhousesavastcollectionofworldart．Itscollectionofover8millionworksisamongthelargestinEurope，documentingthestoryofhumanculturefromitsbeginningtothepresent．
Opendaily，10：00-17：30
Closed24-26Decemberand1January
2．NationalGallery
Foundedin1824，theNationalGalleryhousesacollectionofover2，300paintingsdatingfromthemid-13thcenturyto1900．Themuseumisthefourthmostvisitedartmuseumintheworld，aftertheMuseeduLouvre，theBritishMuseum，andtheMetropolitanMuseumofArt．
Opendaily，10：00-18：00，Friday10：00-21：00
Closed1Januaryand24-26December
3．NationalMaritimeMuseum
TheNationalMaritimeMuseumisthelargestofitskindintheworld，holdingalargenumberofsignificantitemsthatrecordBritain'srichhistoryatsea，includingbooksfromthe15thcentury，aswellasoldshippingrecordsandRoyalNavaluniforms．
Opendaily，10：00-17：00
Lastentry16：30
Closed24-26December
4．NationalPortraitGallery
TheNationalPortraitGalleryhouseacollectionofportraitsoffamousBritishpeople．Itwasthefirstportraitgalleryintheworldwhenitopenedin1856．Thecollectionincludesphotographsandcaricatures（漫画）aswellaspaintings，drawingsandsculptures．
Opendaily，10：00-18：00，
Thursday-Fridayuntil21：00
21．What do we know about the National Gallery？___
A．It has a history of almost 200years．
B．It only exhibits art works of 200years ago．
C．It is the fourth most visited art museum in Europe．
D．It contains the largest collection in the world．
22．You can enter the National Maritime Museum at___．
A.11：00on Christmas Day
B.8：00on Thursday
C.15：00on 1January
D.16：40on Friday
23．What is the purpose of the passage？___
A．To persuade readers to visit London．
B．To compare some famous museums in London．
