---Mother: Bob is sure ______ tonigh.
---Father: Don't be so sure ______ it.
---We got here Tuesday afternoon.
---______Why didn’t you call us earlier?
---Why did Miss Li leave the job?
---She ______ for higher wages, but was turned down in the end.
---Is Alice playing both basketball and tennis for your school?
---She ______. But now she has given up playing basketball.
---Could I ask you some personal questions?
---_______.
---____ was it _____they discovered the entrance to the underground palace?
--- Totally by chance.