Complete the sentences

1. Not/ throw/ plastic bags/. 

→ ___________________________ .

2. Playing/ volleyball/ interesting. 

→ ________________________________ .

3. If/ we/ plant/ trees/ air / fresher.

→ ____________________________.

4. You/ turn off/ lights/ before/ leave/ room.

→ __________________________________ .

5. Yesterday/ he/ go/ gym /with /me.

→ __________________________________.