--Is your mother cooking?
-- .
--How do they get to school?
--_________.
-________, is your mother a teacher?
-Yes.
“________?”
“Yes, that's a great idea.”
“How many classes do you have _______ Friday afternoon?”
“None.We are free.”
--Do you know ________ the MP3 player last week?
--Sorry, I have no idea.
--Don't touch the machine. It's dangerous.
--I ______________.
--Excuse me, where is the clothing store?
--________________. I don't know.