A college teacher once gave a lively class to his students.

He began by holding up a glass with some water in it. He held it up for all to see, and asked the students, “ How much do you think this glass weighs?”

“50g!” “100g!” “125g!” the students answered.

“I really don’t know unless I weigh it,” said the teacher, “but my ________ is what would happen if I held it up like this for a few minutes?”

“Nothing,” the students said.

“OK. What would happen if I held it up like this for an hour?” the teacher asked.

“Your arm would begin to ________.” said one of the students.

“You are right. Now, what would happen if I held it up for a ________?”

“You might have muscles (肌肉) stress. You could ________ move the arm,” said another one.

“You might have no ________ in the arm, or paralysis (瘫痪),”said a naughty student, “You must go to the hospital for sure!”

“Very good. But during this period, did the weight of the glass ________?” asked the teacher.

“No,” the students said.

“Then what ________ the arm ache and the muscles stress?”

The students were in silence.

“No one knows? the teacher asked, “Well, can you tell me how to ________ it?”

“Put the glass down!” said one of the students.

“Exactly!” said the teacher.”The problems of life are something like this. Think of them for a few minutes in your ________ and you seem OK. Think of them for a long time and you begin to hurt. Think of them even longer and you will not be able to do anything. It’s important to think of the challenges in your life, but it’s even more important to put them down at the end of every day before you go to sleep. That way, you are ________ you wake up every day fresh and strong and can solve any problem that comes your way!”

Two boys were on a walk in the forest when they came upon a river that stopped their way. And there was not a________over the river. Both the boys________placed a foot on the surface（表面）of the ice. It was slippery（滑的）. Then one boy________but the other boy kept trying.

"What are you doing?" the taller boy asked. "You'll________!" Bang, the shorter boy fell down. "See? I told you so." The shorter boy got up and carefully took a step. He fell down________. “What are you doing?” the taller boy repeated. The shorter boy got up again and carefully tried a few more steps, ________very slowly.________ the shorter boy, bruised（擦伤的）and________, crossed the river.

"I've________it!" he shouted and then waved to his friend. "Now it's your turn." "I'll fall over." "Probably, I did." "I'll hurt myself. It's much________ here." “Yes, but you wanted to come here, " "I________, but I can't." the taller boy shook his head. "Can't or won't? Just have a try." said the shorter boy.

In fact, we often come across a________like this one. And we have a decision to make. Will we take the risk and cross over, knowing that we could fall and experience________along the way? Or will we stay where we are, feeling safe, thinking that we will________get to where we want in life? As for me, I will choose to cross the river and become a________.

Once, a young boy and his father went out for a walk. On a farm, they saw a pair of old _________ that seemed to be a poor farmer’s.

The boy said, “Why don’t we _________ the shoes and see what the farmer will do when he can’t find them?” “It’s not good to play such a _________,” his father said. “But why not just put some coins in his shoes to see what will happen?” The boy _________ and they put some coins in each shoe.

The farmer came back. As he put his foot into one shoe, he felt something _________ in his shoe. Soon, he found the coins. In _________, he started to look around, but didn’t see anyone. After a while, he again _________ some coins in the other shoe and his tears came out. He said, “Oh, a kind person helped me. Now I can buy _________ for my sick wife and get bread for my hungry children.”

After the farmer left, the father asked his son, “Now tell me which one makes you feel _________? Hiding his shoes or putting some coins in his shoes?” “The second. I’ll never forget the _________ you’ve taught me, dad! Thank you!”