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

The Thang Long Imperial Citadel was the ______ of political power for nearly seven centuries without interruption.

(35)________, the tower was destroyed by US bombs in 1969.  

In the lower layer, the walls are carved with fairies, water evils and men (34) ________ elephants.

This two-story tower  (33) _____ a lotus flower.

This tower is a(n) (32) ______ of ancient Cham architecture.    

Among the ruins of many architectural (31) ______ dug in 1898, a 24-meter-high tower was found in the Thap Chua area.   

Even these days. this still (30) ________ as an attractive secret to contemporary people.

However, it has yet been unable to figure out the reasonable explanation for the linking material, brick baking method, and (29) _______ method of the Cham Pa.