-A ruler is 2 dollars and a pen is 5 dollars. How much are they? -They are
--- _______ I come back before 6 o’clock?---No,you _______.But you _______ be back later than 7 o’clock.
---What’s up? ---There is _______ with my computer. It doesn’t work.
---Why not _______ a party this week? ---That’s a good idea.
Playing with _______ robot is _______ unusual experience for me.
There are some children _____ in the room.