Fill in the blanks with suitable words. One day, a fox was looking (a) — food. He (b) — some grapes hanging (c) — a tree. The grapes looked tempting and (d) —. The fox jumped to catch them (e) — failed. He tried (f) — and again but could not reach them. At last, he said, “(g) — grapes are sour!” and walked (h) —. This story teaches us (i) — lesson: we (j) — not give up so easily.