英语Grammar题目please fill in the blanks with the article "

please fill in the blanks with the article "the" "a" "an",if don't need,put a cross.

1. He became________icon all over the world.

2. He joined his four elder brothers to sing at various clubs in ______Chicago.

3. 'We Are the World' which was about ____love and world peace.

   求大神,感激不尽.