Interpretation:

1. Unlocking tool

2. Metaphor effective methods and tricks

Make sentences:

1. He groped in the dark for a long time before finding the key.

It was careless of you to put the key in the door lock without knowing it.

If I were the key, I would open all the knots in people's hearts.

4. Lin Lin went to the carport to push the bike, but when he reached for his pocket, the car keys were gone, so he was anxious to help the weak.

Diligence is the key to the treasure house of knowledge.

6. Knowledge is the key to wisdom. As long as you pursue it persistently, you will have endless spiritual wealth.

To get the lost key back is like looking for a needle in a haystack.

8. If I forget my key, it will be bad.

9. He took the door key and looked for it everywhere to open the door. It was riding a horse to find a horse.

10. He reluctantly inserted the key and opened the suitcase.

1 1. Lin Lin went to the carport to push his bike, but when he reached for his pocket, his car keys disappeared, making him rub his hands and stomp.

12. Wang Gang lost the key to the classroom door, so everyone couldn't get in, so he shouted.