It’s quite warm here; we __________turn the heating on yet.

Zhanglin was lost in computer games during his last year in high school, otherwise he_______ a student at Beijing University. 

Excuse me, sir.       the driver wait outside?

― Why ______ you stay in the countryside, where it is not convenient to go shopping?―But I’ve found it rather valuable for my health.

— Do you know where Miss Gao is? I couldn’t find her anywhere.— She ________ have gone far, for her coat is still here.