Here are the correct answers for each blank in the passage:
A) 1) traveller
B) 1) began
C) 1) his
D) 2) hardly
E) 4) took
So the complete text would read:
"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 traveller back the quickest. The wind began to blow. He blew strong gusts of air, but the man kept the coat tight against his body. The wind blew still harder 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 took off his coat."