Did you visit the famous museum ?　 —No. We ______ it. But we spent too much time shopping.

David has made great progress recently.—- ________ and ________.

Although these ideas are great and encourage people to think, I _____ disagree with them.

How did it ________ that the ancient building was burnt down in an hour?

We usually have the first class ____________ 8:00 in the morning.