Fill in the where necessary. Did you Know?
1. ....... Australia is ....... biggest continent in the world.
2. ....... Africa covers about one fifth of the total land surface of ....... Earth.
3. ....... Great Wall of China is ....... world's longest man-made structure which stretches for more than ....... 6.400 km.
4. ....... Pyramids are among ....... Seven Wonders of ....... Ancient World because they are geometrically perfect.
5. ....... Tower of ....... London was ....... Royal Residence until ....... 17th century.
6. ....... Galileo built ....... telescope in ....... 1609 in ....... Italy. He used it to study ....... moon and ....... Mars.
7. The part of ....... Thames running through ....... Oxford is often called ....... River Isis.
8. ....... saxophone is a musical instrument invented by Adolphe Sax in ....... early 1840s.