_____in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.

In a Han Dynasty tomb, they found some precious jars and vases, _______ are valuable

Everybody said it was a perfect marriage; no one had ever known________couple.

Do you know sound travels very fast —Yes. But light travels sound.

I like sports very much and I don’t want to stay at home and do nothing.—OK! Let’s __.