If I ______ to bed early, I could have got up in time and caught the train the other day.

It was ______ Lan's carelessness that our flower vases were broken.

This year's good business will ______ last year's slow progress.

David: “Oh look! I found some money at the bottom of my bag.”

Alex: “______”

“I forgot your name, sorry!” he said.

Jackie Kennedy gained reputation ______ her unique fashion style and in-depth knowledge of journalism.

Almost half of the ____ are perfectly suitable for the vacancy. Such a competitive job!

If you have ______ for languages, don't waste the opportunity of travelling and working abroad.

To lose weight, you need to ______ your sugar intake first.

I believe Alex is the most suitable candidate for the job as he has all the necessary qualifications.

Western civilization today has its root from ancient Greece and Rome.

I need to catch up on world events. I haven't seen the news in ages.

All birds have feathers, and feathers are unique to birds. No other major group of animals is so easy to categorize. All birds have wings, too, but wings are not (31) ______ to birds. Many adaptations are found in both feathers and wings. Feathers form the soft down of geese and ducks, the long showy plumes of ostriches and egrets, and the strong flight feathers of eagles and condors. Wings (32) ______ from the short, broad ones of chickens, who seldom fly, to the long, slim ones of albatrosses, who spend almost all their lives soaring on air currents. In penguins, wings have been modified (33) ______ flippers, and feathers into a waterproof covering. In kiwis, the wings are almost impossible to detect. Yet diversity among birds is not so striking as it is among mammals. The (34) ______ between a hummingbird and a penguin is immense, but hardly as startling as that between a bat and a whale. It is variations in details rather than in fundamental patterns (35) ______ have been important in the adaptation of birds to many kinds of ecosystems.