Complete the text with the correct from of the verde in brackets animal survival is a fascinating and complex subject. as these (show),nature (play) tricks on us.two (sit) on a flower.they (look) like bees,but one of (not be) a real bee.) a bee in order to protect itself from possible predators. the real bee on the (have) a sting,which it uses as a weapon to attack its enemies.however,the hover fly on the (not be) dangerous. it s completely harmless.this imitation of one species by another (happen) in nature and is called mimicry. (copy) the appearance actions or sounds of another animal and (help)them to survive

Animal survival is a fascinating and complex subject. as these photos show,nature usually plays tricks on us. two insects are sitting on a flower. they both look like bees, but one of them isn't a real bee. it is imitating a bee in order to protect itself from possible predators. the real bee on the left has a sting, which it uses as a weapon to attack its enemies. however, the hover fly on the right isn't dangerous. it s completely harmless. this imitation of one species by another often happens in nature and is called mimicry. animals copy the appearance,actions or sounds of another animal and this helps them to survive.

Animal survival is a fascinating and complex subject. as these (show), nature (plays) tricks on us. two (are sittin) on a flower. they (look) like bees, but one of (is not ) a real bee. imitating) a bee in order to protect itself from possible predators. the real bee on the (has) a sting, which it uses as a weapon to attack its enemies. however, the hover fly on the (is not) dangerous. it s completely harmless. this imitation of one species by another (happens) in nature and is called mimicry. (copy) the appearance actions or sounds of another animal and (helps) them to survive.

Tower of london after william conquered england in 1066 ad, he needed a castle to live in when he was in london. he needed a castle that would protect london from invaders, but also a castle that would protect him, william, from angry english  people   who didn't like being conquered. to build his new castle, william brought some of the stone over on boats all the way from france, where he had just finished building a castle at caen, his home town. william built the white tower in a romanesque style, with rounded arches. long narrow buttresses helped to support the heavy stone walls. like the walls of cairo just a little later, william's walls have crenellations on the top - little walls that men could hide behind while they were shooting arrows at their attackers. (most of the windows you see were added later). inside, the white tower originally was only two stories high. you walked up and down on spiral staircases. built into the wall, william had several latrine toilets - just a board with a hole in it, and a long chute down to the ground. william also had a well built into his castle, so he could get water without going outside if the castle was attacked. chapel inside the white tower one of the rooms was a romanesque chapel where william could attend christian mass without having to leave his safe castle (except that actually william died before his castle was finished).  tower of london (1200's ad) in the 1100's, king richard built another stone wall around the white tower, to be extra safe, and dug a moat. later kings also worked on the tower, and continued to live there until after 1500 ad.