If you visit a supermarket in the UK in March or April, you will notice a strange thing: Shelf after shelf is filled with large, brightly-colored eggs.

Look a little     1     (close) and you will discover something else. These eggs aren’t real. In fact, they     2     (make) of chocolate. And that can mean only one thing — it’s Easter time again.

Easter is a festival     3     has been celebrated in Britain for thousands of years. These days we mark the occasion (场合) by     4     (give) each other chocolate eggs, or Easter eggs. But what are the roots of this     5     (tradition) event?

For Christian people Easter is a religious festival. According     6     the Bible, Jesus Christ was killed by the Romans     7     came back to life three days later. That is     8     Easter is seen as a time of rebirth.

However, some people suggest that Easter has its origins in pre-Christian times. They say that the very earliest societies celebrated the end of winter and the beginning of spring — the time     9     life returns to the land.

Whatever its origins, Easter is big business. The UK’s biggest retailer (零售商) of Easter eggs sold more than 20 million units last year and some Easter eggs     10     cost more than £20!