My grandfather doesn't know               to use a computer.

---____ levels does the game have? -Five.

----I called him twicw and I couldn’t get through to him.----The line might have been out of order,_____?

---- _____ is it today?     ---- It’s Tuesday.

----He’s never sung English songs before, __________he? ----_________. It’s his second time to sing in English.