Choose A, B, C, or D that best completes each sentence.

Australians ____ English as their mother tongue.  

It is particularly fascinating to see the bridge (10)___ and close below your feet.

It is particularly (9)___ to see the bridge (10)___ and close below your feet.

In 2014, glass floors were installed in the walkways, giving visitors another, unusual view from the bridge. The long glass floors, more than 40 meters above the river, allow you to (8)__ the traffic over the Tower Bridge from above.

Taking photographs of the Tower Bridge is a favorite London tourist activity, but you can also go inside the bridge, where you'll have a magnificent view over London from the walkway (7)____ the two bridge towers.

Taking photographs of the Tower Bridge is a favorite London tourist activity, but you can also go inside the bridge, (6)_____ you'll have a magnificent view over ..

(5)_____ photographs of the Tower Bridge is a favorite London tourist activity, ...

Over time, the bridge has become one of London's most famous (4)___.