阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。
A
A trip to the capital wouldn't be complete without seeing the following attractions in London.
The London Eye (Tickets from £24.50)
Explore London from above on the London Eye. Your ticket includes a 30-minute flight with breathtaking views over London as well as an amazing 4D experience. Book ahead to save money and skip most of the queues with a fast-track entry ticket.
Tower of London (Tickets from £25)
Hear the many stories of the Tower of London on a Yeoman Warder (Beefeater) tour. See the famous Crown Jewels, the White Tower and find out what it was like to be a prisoner in the Tower of London.
Kidzania London (Tickets from £18.50)
Test out a range of professions and activities including journalism, animal care, cabin crew and tour guiding at KidZania London. Work to earn KidZos and save them for next time or spend them in the Airport Shop. Great for kids to learn and have fun.
The Royal Observatory Greenwich (Tickets from £16)
Visit the home of time and explore outer space at the Royal Observatory in Greenwich. See and stand astride the Prime Meridian line (子午线), the reference point for Greenwich Mean Time. Learn about the history of longitude (经线), touch a piece of rock from outer space, and enjoy amazing views over London.
Coronavirus information: London is currently subject to a four-week national lockdown from 5 November, which means attractions are temporarily closed. You can still book tickets in advance ready for when they reopen with social distancing and other safety measures in place. Cycle or walk to these attractions where possible.
21.What can you do when visiting the London Eye?
A．Spend £24.50 at the most.
B．Buy the ticket on your arrival.
C．Get a special entry ticket to save time.
D．Pay extra money to enjoy the 30-minute flight.
22.What is special about Kidzania London?
A．It combines learning with entertainment.
B．It enables visitors to have a good view of London.
C．It offers visitors an experience of being a prisoner.
D．It is not influenced during the four-week lockdown.
23.Which attraction will you choose if you are interested in natural science?
A．The London Eye. B．Tower of London.
C．Kidzania London. D．The Royal Observatory Greenwich
