题目内容：

Tower bridge is one of London’s most striking attractions that you shouldn't miss when 1.（visit）the capital. This extremely attractive and impressive piece of Victorian architecture dates back to the late 1880s, and until the mid -1970s the main bridge 2. (operate) by a steam engine.

    Today tower bridge is a splendid landmark typical of London, surrounded by cafes and bars 3. tourists and locals alike can sit and enjoy the 4. (beauty ) bridge , which

looks like two small castles hovering over the Thames, just like something out of a fairy tale.

It is free to admire Tower Bridge and walk on it at any time; it’s striking to look at during the day and magical when 5. (light ) up at night, so don’t miss out on this wonderful scene !

If you would like 6.(step) inside the towers of the famous bridge , you can book Tower Bridge Exhibition tickets. During the exhibition , you can visit the famed engine rooms and impressive towers and find 7. how the bridge came into 8.(exist) through the digital displays and animations(动画片). You can also pay 9.visit to the glass room of Tower Bridge on the high-level walkways. There 10. (be) even yoga classes available on the glass floor of Tower Bridge.