In the first book, Lyra’s scientist father makes ______ possible to enter other worlds.

— Would you get me a bar of chocolate from the kitchen, dear?—______one?                                        

In winter, the weather of Moscow is ______ colder than _______of Beijing.

____________professional violinist practices for several hours a day, but____________ violinist has his own way of playing the Beethoven concert.

People working 10 or 11 hours a day are more likely to suffer from heart problems than_____ who go off duty after seven hours．