“Well done，John! Not a single mistake     in your exam paper this time!”said the teacher．

He is ready to help others, seldom, ______ refusing them when they turn to him.

Only after my friend came ____.

Nowhere else in such a small town, I think _____ a book as good as this one.

However, the eruption itself is really exciting      and I shall never forget my first sight of one.

The computer was used in teaching. As a result, not only _____, but students became more interested in the lessons.

For a moment nothing happened .Then ____ of the falling stones and soils.

At the good new __ ___.

_ __ with the size of the whole earth, the biggest ocean does not seem big at all.

In no case _______ go _______ the law of nature or we’ll meet endless suffering．