b1 : Make up sentences using the words and phrases given .
1. Internet / change / way / we / communicate.
2. I / email / my / pen pal / Australia.
3. do / think / spending / you / much / too / time / is / the / on / Internet / harmful ?
4. are / sides / the / positive / and / negative / what / of / the / Internet ?
5. Internet / the / useful / is / , / but / also / it's / a / place / dangerous / .
Cần nhanh ai nhanh cho tick.