—Don't be angry with your kid when he makes a mistake again, will you?—No, I won 't.  I know  that     of us  are perfect after all.

Listen! ________ is knocking on the door. Go and see who it is.

I’m moving to the countryside because the air there is much fresher than      in the city.

(2014·河南郑州高中毕业年级质量预测)Helen has been looking for a job over the whole year，feeling she can’t get________without work experience.

—Oh, ________ air is so bad. Shall I open the windows to let in ________ fresh air?—Ok, thank you.