Read the text and fill in the gap with the correct grammatical form, choosing it from the four suggested options.

The wind and the sun argued one day over which one was the strongest. They saw a man walking along the road and they wanted to see which one could take the coat from the ... back the quickest. The wind ... to blow. He blew strong gusts of air, but the man kept the coat tight against ... . The wind blew still ... but the man held his coat tightly. The wind could not take the coat from the man. It was now the sun's turn. The sun did very little, just quietly shone upon the man until he became so warm that he ... off his coat.