阅读理解。 There was an old pear tree in a man’s garden. In the past, the tree fruited every year, so阅读理解。 There was an old pear tree in a man’s garden. In the past, the tree fruited every year, so the man would get many pears. But now, the tree got old. There were no more pears for the man. So the ungrateful（） comes from pear trees. C. Old people are kind and friendly. D. Birds and bees are always helpful.