— You may find the key to the maths problem on page 107. — Ah, it’s so simple. I wonder why I ______ of that.
After swimming in the sea,they came out of water and lay on the ___________ for a rest.
Life is tough in the city.In order to lose their _________,some people drink alcohol.
What a poor boy!He was born with __________ his backbone.
He moved to a big city to try his __________.
You can only tell the news to Tom,Jack and Bill,and __________ it should be kept.