`1`. Music came first. 

`-` Dẫn chứng: câu `1`, đoạn `1`

`2`. The oldest instruments were made more than 42, 000 years old.

`-` Dẫn chứng: câu `2`, đoạn `1`

`3`. A bow is often used to play string instruments by musicians.

`-` Dẫn chứng: câu `5`, đoạn `2`

`4`. It makes from the peace of wood with hairs or strings stretched between its ends.

`-` Dẫn chứng: câu `6`, đoạn `2`

`5`. The air inside  a percussion instrument makes the sound louder.

`-` Dẫn chứng: câu `3`, đoạn `3`

`6`. When you press the piano heys, hammers inside the piano hit the strings to make music.

`-` Dẫn chứng: câu cuối

Answer:

1. Music was came first

2. One of the oldest instruments ever found is more than 42,000 years old.

3. Musicians often use a bow to play string instruments.

4. The bow is a piece of wood with hairs or a string stretched between its ends.

5. The air inside a percussion instument makes the sound louder.

6. When you press the piano keys, hammers inside the piano hit the strings to make music.