Complete the text with the correct form of the words in capitals. There is an example at the beginning (0).The songs of the humpback whale are beautiful (0) collections of moans and sighs and it is possible to make (1) ____ of these with a microphone.With enough (2) ____ you can listen to a song and tell which year it was sung in and where it came from.пожаловатьсяThe whales do most of their (3) ____ in the winter season,after their annual (4) ____ south from the Arctic. It is always the young males who set off first to the tropical breeding areas,and most of the (5) ____ are given by solitary males who are looking for a mate.The songs all have a definite sequence of parts. This (6) ____ is never changed, and there are clear rules of (7) ____ which must not be broken.  There is very little (8) ____ between the songs at the start of a season and those from the previous year. However, over the next few months, the different parts of each song may be swapped, shortened, and (9) ____ may be made to the notes. During a breeding season, the whales all try to sing the most up-to-date version of the song.   (10) ____ is similar to the way human language evolves, with contributions from many members of the population. 
0) collect 1) record 2) practise 3) sing 4) migrate 5) perform 6) arrange 7) compose 8) differ 9) alter 10) develop

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1. a recording2. patience3. singing4.migration 5. performances 6. arrangement 7. cpmposing(composition) 8. difference 9. alterings 10. development