Put the verbs in brackets into the correct tense and voice The houses of parliament is the seat of the British Parliament,

The Houses of Parliament is the seat of the British Parliament, a great mass of buildings on the east bank of the Thames in London. It was built in the 19th century after plans by Sir Charles Barry. The Houses of Parliament includes three massive towers: Victoria Tower, Middle Tower and Saint Stephen or the Clock Tower which contains a clock and a great bell, Big Ben, weighing 13.5 tons. There are also the House of Peers, the House of Commons, the residence of the Speaker, the libraries and the offices. During the World War II the buildings were bombed heavily and seriously damaged.