---Open the window please, Mike ? ---________? I didn’t hear what you said.
Do you know where ______ from?
It’s difficult _____ your sound because the noise is too high.
We don’t know If it _____. If it_____, we won’t go out for a walk.
The teacher is ____ with what we did.
Xi’an is very famous ______Terra Cotta Warriors (兵马俑).