Choose the letter A, B, C or D to complete the passage below

Let’s ________ (6) at this picture. It’s the Great Pyramid of Giza. It __________ (7) a symbol of Egypt and the last of the ancient Seven Wonders of the World. It is located on the Giza, near the modern city of Cairo. It is __________ (8) and the oldest one among the three pyramids of the Giza Pyramid Complex. Scientists believe that this pyramid was built ___________ (9) a period of 10 to 20 years. For over 3,800 years, the Great Pyramid of Giza stood tall as the world’s tallest structure. In the pyramid, there is the _________ (10) of Khufu, the Fourth Dynasty Egyptian pharaoh.

(6)..................

• A. 
  to look
• B. 
  looked
• C. 
  look
• D. 
  looking