Shanghai Waihuan Tunnel is already open to traffic, so it will take us ______ time to go to Pudong International Airport.

The old pen is broken, I’d like ______ one to write with.

There is ______ food in the fridge.

_____ of them knows Japanese, so I have to ask a third person for help.—You’d better ask Tom for help. He is good at Japanese.

My mother is talking _____ my teacher. [ ]