1 . Lots of animals play. But the behavior is best known in mammals (哺乳动物) and birds. Now the scientists at London’s Queen Mary University report that bumblebees (大黄蜂) know the same thing. But before this, there were no reports of insects playing.

Dr. Lars Chittka began to wonder if bumblebees played during an earlier test. In that test, Chittka guided bumblebees to move balls into a goal for food. He noticed that some bees were rolling (滚动) balls even when they weren’t given food. He wondered if they were playing.

To test the idea, the scientists at his lab set up a new test. First, they numbered 45 young bumblebees between one and 23 days old. The numbers let them follow bumblebees’ behavior. Then, they set up a clear pathway from the bumblebees’ home to a feeding area. On either side of the open pathway, the researchers placed small colored wooden balls. On one side of the path, the balls couldn’t move. On the other side, the balls could roll around. For three hours a day, over 18 days, the scientists opened the pathway between the home and the feeding area. The bumblebees never had to leave the pathway to find food, but they left anyway. They weren’t interested in the side where the balls didn’t move, but they made lots of visits to the side with the rolling balls.

Catching the balls with their legs, the bees would move their wings to pull on the balls, causing them to roll. The 45 numbered bumblebees did this 910 times during the test. Though some only did it once, others did it a lot. The younger ones liked to spend more time rolling balls while the older ones showed less interest in it. One bee was recorded rolling balls 44 times in a single day. One was seen rolling balls 117 times over the whole test.

The test raises important questions about how the insects’ minds work and whether they have feelings.

7 . You can either travel or read, but either your body or your soul must be on the way. The popular saying has inspired many people to read or go sightseeing. Here are four books that you can take on your trip.

1. On the Road, 1957, by Jack Kerouac

The book is a popular spiritual guidebook about youth. The main character in the book drives across the US continent with several young people and finally reaches Mexico. After the exhausting and exciting trip, the characters in the book begin to realize the meaning of life.

2. Life Is Elsewhere, 1975, by Milan Kundera

Jean-Jacques Rousseau once said, "Man is born free, and everywhere he is in chains." The book describes a young artist's romantic but miserable life, about how he reads, dreams and has a relationship during his trip to Central Europe. The book invites you to deeply reflects on your current life and to honor the Czech-born writer Kundera.

3. My Name Is Red, 1998, by Orhan Pamuk

The book, a masterpiece of the Nobel Prize winner for Literature Orhan Pamuk, has been translated into more than 50 languages and published around the world. It tells a story of a young man, who was away from home for 12 years, coming back to his hometown in Istanbul. What embraces him is not only love, but a series of murder cases as well.

4. The Unlikely Pilgrimage of Harold Fry, 2013, by Rachel Joyce

The novel tells a story of a 60-year-old man who lived a boring and unhappy life, until one day, he received his old friend's letter who got cancer. In deep shock and sorrow, he went out to send his reply letter. 627 miles in 87 days, he walked depending on one belief that “his friend can survive as long as he walks”.

I always sit down comfortably in the barber’s shop and listen patiently     1     my barber(理发师). He either explains the current political situation and women’s fashions or tells me jokes which I     2    (hear) at least five times already. In twenty     3    (minute), I get a great deal of information as well as a hair-cut.

But last week our conversation was very short indeed. We heard loud cries of “fire!”    4    (come) from upstairs. All of the customers and barbers made up their minds     5     (escape) from the shop immediately.

We were     6    (certain) a funny sight to passers-by! I had a white sheet round my neck and my hair     7    (be) half cut. My barber was close behind me with a comb and a pair of scissors in his hands. One of the customers     8     had sat next to me was not so     9    (luck). There were still soap bubbles on one side of his face and his barber ran after him holding a shaving-brush in one hand and a razor in the     10    !

10 . We came back to the classroom after lunch while our classmates were playing outside．

"Look at ______ I found in Ms． Lee's office．" Karen， a friend of mine， held up a small box filled with pieces of chalk in every color of the rainbow．

"Wow! What fun it would be to write on the ______， " Judy's eyes shone with joy． "But Ms． Lee doesn't let us do so，" I responded． "Don't be ______， Janet． No one will ever know，" said Karen， ______ into the box and drawing out some chalk． At first I______ joined my friends， however， gradually I found it was fun．

Then it struck Judy that we should______ each other to write names with our left hands． Picking up their chalk， they started． I ______ a white piece…

"Better get this board cleaned off now，" said Judy， ______ what I wrote on the board． Everything came off ______ my name! I was sweating in______ and I felt my knees were getting______． It wasn't chalk at all， but a white piece of crayon（蜡笔）． Mom had a______： "Fools' names and faces always______ in public．" I never understood ______ what it meant before． Now I did!

I rushed to the toilet to get a can of cleanser and Judy______ with paper towels． After rubbing hard， my name was ______， but an abrasion（磨损处） remained on the board．

Hearing ______ coming， we remove every trace of wetness as ______ as possible． We were just slipping into our desks ______ the teacher walked in． Perhaps Ms． Lee never ______ the abrasion． But I did． I learned that day： "No one will ever know" is never true．