Today is February 28th. It's Jane's birthday. She is twelve years old Bill, Paul and Linda are her friends. They want to buy some presents (礼物) for her. They go to a store near the school. There are lots of things in the store. They buy a big cake, a box of colour pencils and a backpack. They want to buy a watch for her, but all the watches are too expensive (昂贵的).