In China's countryside, villagers often have the same family name, but ________ not be closely related.

If you _____ leave early on weekdays, do it quietly. The other classmates are also dying to have an early leave.

 The man in the office ____be Mr. Black because he phoned me from London just now.

----Will you take up teaching as a career after graduation?---- Hard to say. I ________ go abroad for higher education instead, but it depends. 

You had better _________ wine because you have to drive back home.