It was the last day of the examination in a university. A group of students were talking about the exam that was going to begin soon. This was the ______ exam, and then they would graduate and go to work. On their faces was confidence. After four years’ hard study in the university, they were ______ and were able to take it. The coming exam, they thought, would be a(n) ______ one, as the professor（教授）had said they could bring either books or notes, but they could not ______ from each other during the exam.

They walked into the classroom peacefully. The professor gave out the papers. And the students found there were only five ______.

Three hours had passed, and the professor began to collect papers. The students no longer looked confident. The professor looked at the ______ looks on their faces, and then asked, “How many students have ______ all the five questions?” No hand was ______. “How many students have answered four?” Still no hand. “Three? Two?” Still no hand. “One, then?” The class remained silent.

The professor put down the papers. “That is exactly what I ______,” he said. “I just want you to know that although you have completed four years’ study, there are still many things you don’t know.” Then, smiling, he added, “You will all ______ this exam, but remember-even though you are now university students, your education has just started.”

Over 30% of the produced food goes to waste, according to The United Nations Food and Agriculture Organizations（联合国粮农组织）. Supermarkets throw away food that is not sold before its sell-by date, while families throw away food that they can’t finish eating. To stop food waste, some people have come up with great ideas. Take a look for yourself.

The world’s first food bank was created in the US in 1967. The bank took donations（捐赠）of food from people and stores that had extra food. People could then go to the food bank and take the food home if they could not afford to buy any for themselves. In Shanghai, there is a “shared fridge” in some communities. It stores（储存）food that is donated by nearby markets and restaurants. It’s free for anyone to take.

A UK company called The Real Junk Food Project says that food that has passed its sell-by date is still safe to eat. They collected this food from supermarkets and sell it in cafes. You only have to pay as much as you feel is necessary. If you don’t want to spend money, you can volunteer at the cafes instead. There are now 125 Real Junk Food cafes worldwide. And the number is growing quickly.

What else can we do to stop food waste? The answer is simply buying less food. There are millions of people around the world who still don’t have enough to eat. We should be more careful about how we shop for food.

Be Thankful for Others’ Help

Once upon a time, there lived a big mango tree. A little boy loved to come and play on it every day.

Time     51    , the little boy got a bit older and he no longer played on the tree.

One day, the boy came back to the tree with a sad look on     52     face.

“Come and play with me,” the tree said to the boy.

“I’m     53     a kid. I don’t play on trees anymore,” the boy replied. “I want toys. I need money to buy them.”

“Sorry, I don’t have money. But you can pick my mangoes and sell them, so you’ll have money.”

The boy was excited. He picked all the mangoes on the tree and left     54    .

Twenty years later, the boy had grown into a man. He returned to the tree again.

“Come and play with me,” the tree said.

“I don’t have time     55    . I have to work for my family. We need a house.”

“Sorry, I don’t have a house, but you can cut off my     56     to build your house.”

The man cut all the branches off the tree and left happily. The tree was glad to see him happy.

Forty years     57    , the man returned. He was much older.

“Sorry my boy, but I don’t have anything for you anymore, except my     58     roots（根）,” the tree said.

“I don’t need much now, just a place to rest. I     59     after all these years,” the man replied.

“Good! Old tree roots are the best place to lean on and rest. Come and sit down     60     me.”

The man sat down. The tree was glad to see him once again.

Building blocks（积木）are still one of the most popular traditional toys today. Children are interested in their design（设计）. Most traditional toy building blocks were first made of wood. Today, wooden building blocks are still used. (A) _________ now there are several other types of building blocks to choose from, like plastic（塑料的）building blocks.

Children build all kinds of things that they see in everyday life with building blocks. This gives them the chance to learn new things and life skills.

(B) 积木能帮助孩子练习他们的语言技能。Most children talk to each other as they build things with these traditional toys. This type of toy also helps develop the skills that children need in life. As they begin to join groups playing with building blocks, they learn to take turns, share and solve problems with others. However, these are not the only advantages of playing with building blocks.

(C) Building blocks can also help develop children’s skills in math and science. They allow children to work according to the steps of scientific discovery, (D) ________ are first to watch and think, and then to test. Traditional toy building blocks also come in different shapes, colors and sizes. These types of building blocks encourage children to develop skills in dividing things.

(E) Playing with building blocks is not only fun but also very helpful. Maybe that is the reason why building blocks are still popular today.