Mr. Li ____ to give a talk in our school yesterday.

— Look at the sign on the right. — Oh, parking        here.          

 ---Look, what have you done?---Sorry. I think if I _____another chance, I’ll do it better.

－Did the doctors save the old man？－Yes. He _______ on the morning of May 10th. And now he is out of danger.

More and more people have realized that we won’t have cleaner water to drink unless something _______soon.