你会用“a”和“an”吗？试着填一填，补全句子。

1. My mother is ___________ singer.

2. He is ___________ artist.

3. She is ___________ actress.

4. My father is ___________ policeman.

5. Li Hua is ___________ engineer.

Read and guess.（读一读，猜一猜是什么季节）

It's very cold and it snows. We can make a snowman. Christmas is in this season.

1. __________

It's rainy and wet. Trees and flowers begin to grow.

2. __________

It's cool and foggy. Trees lose their leaves.  People can eat a lot of fruits in this season.

3. __________

It's hot and sunny. So people often go swimming in this season.

4. __________