When you read the book, you’d better make a mark _____ you have any questions.
It is so difficult a question_______ none of the kids could work it out.
Kunming is called “Spring City”, but it _____ snow in winter.
The old black woman sat under the pine tree, her grandsons, ______ around her, ______ to an old story.
He was elected______ president of the company, and _____news came ,in fact, as ______surprise.
--- Will you read me a story , Mummy? --- Ok. You ____ have one if you go to bed as soon as possible