任务型阅读。

David is celebrating his birthday today. His mother brings a birthday cake to his class. David is going to share the cake with his friends to celebrate his birthday!

There are some small candles on the cake. Why do we put candles on it? The candles can show our age. David's cake has eleven small candles, because he is eleven years old. For old people, one big candle shows ten years. Eight big candles will show that a person is eighty years old.

The teacher helps David light the candles and the children sing the birthday song. David makes a wish. He blows out the candles. Everyone claps. Then he cuts the cake and gives each of the friends a piece of cake. Everyone is happy.

任务一：根据短文内容，补全下列句子。