Jim is good at English. He often gives me some useful ____on how to read English.

What on earth did you tell her? The_____on her face suggested that she was very angry.

There is no____ that China will be a powerful country in the future.

--- Believe it or not, last month in America I came across the girl whose photo was in the drift bottle I had got 3 years before.
--- Really? That’s the most surprising ___________________ I’ve ever heard of.

To come back before Sunday, I have made a few minor ________ to the schedule of my trip.

They discussed the issue of the world’s climate in Durban, South Africa several times but could come to no ________.

Internet is an important _____ for people to get the latest news.

Books are a worthy invention of human history since they make it possible for us to make a__of human’s thoughts.

His_______today made me angry . He should do things politely.

Many scientists have believed that there may be a _________of life on the Mar．