When I was seven years old, my family grew our first square watermelon. No one  (see) a square watermelon before, so it became famous instantly. People visited our garden to see  unusual fruit. What’s so great about square watermelons? Well, besides their   (usual) shape, the melons pile nicely, fit in the refrigerator, and won’t roll off the table.
Whenever people ask they can grow their own square watermelons, my dad tells them to “use square seeds”. Truthfully, though, my dad discovered the key square fruit by accident.
We have a small vegetable garden   we plant watermelons every summer. The young melons were placed on cinder blocks (空心砖) to keep them from rotting on the wet ground. In 1996, we went to London for vacation. When we returned weeks later, we were surprised   (find) a young melon stuck in the centre of a cinder block. The watermelon had grown inside the block until   was squeezed too tightly to remove.
“We didn’t want to kill it, so we just left it there, ” my father remembers. “ (surprise), when we broke the cinder block at harvest time, we found a perfectly healthy melon–but it was also perfectly square.” Since that summer my family has been growing square watermelons on purpose because they are always well (receive).