Complete the following text with suitable verbs in the box with their right forms. $\begin{array}{|l|l|l|l|l|} \hline \textbf{take} & \textbf{be} & \textbf{form} & \textbf{refresh} & \textbf{walk} \\ \hline \end{array}$ Walking (a) — a good exercise. It develops our body and (b) — our mind. It is beneficial to health. One can (c) — fresh air and enjoy the beauty of nature if one (d) — in the early morning. So walking should be (e) — as a habit by people of all ages.