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
Washington, D.C. Bicycle Tours
Cherry Blossom Bike Tour in Washington, D.C.
Duration: 3 hours
This small group bike tour is a fantastic way to see the world-famous cherry trees with beautiful flowers of Washington, D.C. Your guide will provide a history lesson about the trees and the famous monuments where they blossom. Reserve your spot before availability – and the cherry blossoms – disappear!
Washington Capital Monuments Bicycle Tour
Duration: 3 hours (4 miles)
Join a guided bike tour and view some of the most popular monuments in Washington, D.C. Explore the monuments and memorials on the National Mall as your guide shares unique facts and history at each stop. Guided tour includes bike, helmet, cookies and bottled water.
Capital City Bike Tour in Washington, D.C.
Duration: 3 hours
Morning or Afternoon, this bike tour is the perfect tour for D.C. newcomers and locals looking to experience Washington, D.C. in a healthy way with minimum effort. Knowledgeable guides will entertain you with the most interesting stories about Presidents, Congress, memorials, and parks. Comfortable bikes and a smooth tour route (路线) make cycling between the sites fun and relaxing.
Washington Capital Sites at Night Bicycle Tour
Duration: 3 hours (7 miles)
Join a small group bike tour for an evening of exploration in the heart of Washington, D.C. Get up close to the monuments and memorials as you bike the sites of Capitol Hill and the National Mall. Frequent stops are made for photo taking as your guide offers unique facts and history. Tour includes bike, helmet, and bottled water. All riders are equipped with reflective vests and safety lights.
21. Which tour do you need to book in advance?
A. Washington Capital Sites at Night Bicycle Tour.
B. Washington Capital Monuments Bicycle Tour.
C. Capital City Bike Tour in Washington, D.C.
D. Cherry Blossom Bike Tour in Washington, D.C.
22. What will you do on the Capital City Bike Tour?
A. Meet famous people. B. Go to a national park.
C. Visit well-known museums. D. Enjoy interesting stories.
23. Which of the following does the bicycle tour at night provide?
A. Safety lights. B. Cameras. C. Meals. D. City maps.
