Complete the following text with suitable verbs in the box with their right forms. $\begin{array}{|l|l|l|l|l|} \hline \textbf{agree} & \textbf{ask} & \textbf{promise} & \textbf{accept} & \textbf{return} \\ \hline \end{array}$ One day the great poet Ferdousi (a) — by Sultan Mahmud to write Shahnamah in honour of Sultan. The Sultan (b) — to pay Ferdousi a gold coin for each verse. Ferdousi finished his writing and it was found containing sixty thousand verses. Now Sultan didn’t (c) — to pay sixty thousand gold coins. He wanted to pay silver coins instead. The poet (d) — silver coins and (e) — to his village.