阅读下面短文，并用英语回答问题 (请注意每小题的词数要求)。
Mother's Day is on the second Sunday in May. My sister and I usually celebrate this day by making some delicious food for our mum.
My sister usually makes a banana milk shake for my mum. First, peel three bananas and cut them up. Next, put the bananas, some milk and ice cream into a blender. Then, turn on the blender. The milk shake will be ready in three minutes.
As for me, I usually make a chicken sandwich for my mum. First, spread (涂) some honey on one piece of bread. Next, cut the chicken into thin pieces and mix them with some pepper. Then, put the chicken pieces and some onions on the bread. Finally, put another piece of bread on the top.
How do you give thanks to your mum? Do you also make some food for her?
1. How do the writer and her sister celebrate Mother's Day? (不超过 10 个词)

2. Who makes a banana milk shake for the mother? (不超过 10 个词)

3. Why do the writer and her sister make some delicious food? (不超过 10 个词)

1.By making some delicious food for their mum.
2.The writer’s sister./The writer’s sister usually makes a banana milk shake.
3.Because they want to celebrate Mother’s Day./To give thanks to their mum.