Complete the text with the correct form of the present perfect simple , the present perfect continous or the past simple of the verbs in brackets.The word 'iceberg' probably comes from the norwegian word 'isberg' , which means 'ice mountain' . Every year about 10,000-15,000 icebergs form around the world . Although modern ships know where icebergs are now , in the past icebergs (1)........(be) one of the biggest dangers in the sea . the famous titanic (2)........(sink) when it hit an iceberg in 1912 and many people (3)........(die) because of this accident , thirteen countries (4).........(from) the international ice portal in 1914 this organisation(5)......... (give) information to ships about icebergs ever since Biologists(6).........(study) icebergs for a long time to find out how they chage sea life . When an icebergs melts , nutrients go into the sea .Recently , scientist(7)........(show) that the water near ice bergs is full of plankton , fish and other sea life.
Scientits(8)........(notice) the way icebergs fall to pieces when they are warmer waters . one of the biggest icebergs(9).........(break) off from the rose ice shelf in antartica in 2000 it was 295KM long and 37KM wide! ​