阅读短文，选择正确的答案。 Mrs. Green is going to give a birthday party for Mary (Mary is her daughter). Mary is going to be thirteen years old. Twenty friends of Mary's are going to come to the party. They are all girls. Mrs. Green is getting ready for the party. Mrs. White is helping her.
“Let's make a pretty cake,” Mrs. White says to Mrs. Green.
“OK. Thank you very much.”
Mrs. Green is going shopping now. She's going to buy fruit for the party. Mrs. Green buys some fruit. She buys a lot of pears, oranges and bananas. Then she goes home.
It's three o'clock in the afternoon. Everything is ready. Now the first girl is arriving. The party is going to start in thirty minutes.
