There are many helpful social organizations in the world.翻译

There are many helpful social organizations in the world.翻译 How many continents are there in the world?翻译 There are many animals in the world There are many ( ) (language) in the world How many letters are there in the world?脑筋急转弯 英语翻译In the World Park,there are many buildings ----- ----- - how many letters are there in the "world". there are many teachers in the world.they____their students how many letters are there in the "world" How many nations are there in the world? How many l______languages are there in the world? How many letters are there in the world?-----____________.(回