学进去

One morning, a teacher was giving a lesson in a middle school. All of the students stared at him in _________ because the teacher had a rope (绳) in his hand.

At the beginning of the class, the teacher didn’t say anything. _________ he started tying knots (打结) in the rope. Then he asked, “I have tied three knots in this rope. Is it the same rope I had before?”

One of the students replied, “It’s not _________ to answer. The rope seems to have _________ from the outside. It has three knots which were not there before. But from the inside it is still the same rope _________ it was before.”

“Yes, you are right!” the teacher said. “Now, I will untie (解开) these knots.”

Then he began to _________ both ends of the rope away from each other.

Seeing that, the student said, “You are not untying them. You are making them tighter (更紧的).”

So the teacher stopped and asked, “_________ can I do to untie these knots?”

Some students replied, “You have to look at them closely so that you will know how they are tied. Then you can try to untie them.”

The teacher said, “That’s what I want to hear. In our lives, many people want to _________ problems, but they don’t even know the reasons that cause the problems. Just like the _________ goes, everything must be carefully examined before we act. We need to first know the cause of a problem, and only then can we solve ____________ as soon as possible.”