—Look, what have you done? —Sorry. If I another chance, I’ll do it better.
—When will the second class begin? —________ two minutes.
I’m very proud of that Beijing is one of __________ cities in the world.
—Who helped Mark with his English? —_________, he taught himself.
Qingdao is a good place for summer vacation. My father ___________ there several times.
Remember to wash your hands __________ you have meals.