Mike and Yifan made some riddles(谜语) for Robin.

a.   b.   c.   d.

A. summer   B. autumn   C. winter   D. spring

It's always warm and rainy. There are many flowers everywhere. People often have a picnic and go camping in the park. Which season is it?

This season is golden. Farmers are busy. They often pick apples. The Mid-Autumn Festival is in it. Which season is it?

Trees and leaves are green. It's sunny and hot. People often go swimming. We can eat ice cream. Which season is it?

It's very cold. There are almost no leaves on the tree. Children often make a snowman. New Year's Day is in it. Which season is it?