—Do you know sound travels very fast? 一Yes. But light travels _________ sound.
--- The Greens have gone to Yangzhou for a trip, haven’t they ? ---____ , and they will return tomorrow afternoon.
--- The presidents of China and Russia had ____ interview a short time ago . --- And it was ____ great success. .
_____ you’re right.I'm not sure.
There isn’t ______ in today's newspaper.
.His hair is shorter than _______.