-It’s Sunday. ____________―Let’s see the lions. OK?
It's foggy today. I'm not sure _______ the highway will be closed soon.
No one knows ____ .
---I seem to be lost. Could you tell me _____? ---Sure. You can take the No.3 bus to get there.
----Please tell me ___________________an hour ago. ---He rode his bike.
Do you know__________? –He came here by train.