1. It is called. 2. The strings were made.

3. Nylon ones are used.

4. It is usually played or used.
все пассивные предложения, перепишите их как активные.​

1 They call it.

Present Simple, active

2 They made the strings.

Past Simple, active

3 They use nylon ones.

Present Simple, Active

4 They usually play or use it.

They usually play it or use it.

Present Simple, Active

В номере 4 можно 2 варианта))