One day, David and Sharon decided to go for a walk in the snow.

“Oh David, look at that wonderful view of our garden! We’re so lucky to live in such ________ beautiful place, aren’t we?” shouted Sharon.

“Yes, I think so, but it could be even ________” answered David. “What do you mean?” asked Sharon.

“Well, look at those little birds. I’m not so sure ________ or not they like the trees in snow. The poor little things can’t find anything to eat. We ________ the view now, but the birds are so cold and hungry!” said David.

“I understand! You’re right, David. We should do something ________ those hungry birds,” said Sharon. After a while, David said, “Why don’t we make ________ delicious bird food and put it outside so that the birds can enjoy it?”

Both of them got busy in the kitchen making food ________ the birds. The food was good enough to keep the birds going when the ground ________ in snow and they couldn’t find any food. Sure enough, the birds came flying to the ________ home-made house, which they hung from the trees in David’s garden. ________ warm winter for the birds! All winter long, the birds were well-fed and everyone was happy again.

Long ago, there was a poor little boy who lost his parents. He was raised（抚养）by his neighbors. When he was seventeen, he started to live on his own. The young man was so kind and helpful that everyone _______ him.

He was hard-working, too. He never stopped his farm work _______ it was very dark. As a result, his house was messy（凌乱的）and he often ate leftovers（残羹剩饭）.

One day, on his way home from work, he _______ a big river snail（蜗牛）. He took it home and kept it in a crock full of water.

The next evening, when he got home, he was _______ to see hot food on the table steaming. What’s more, his house was clean and tidy. He thought all the things must be done by his kind _______.

Later, this happened every day. The young man decided to say thanks to his neighbors. However, _______ of them knew about that. He made up his mind to _______ who was helping him.

The next morning, he went out as usual but returned much _______. He hid himself outside the house and waited to see what would happen. Soon, a girl came out of the crock and started cooking.

The young man rushed into the house and took the shell（壳）of the river snail out of water. It was _______! Then he came to know it was the river snail girl who helped him. The river snail girl told him she was sent to help him because of his ________.