根据对话内容使对话完整。
A: What is the date today, Mary?
B: __1__ May 21st.
A: Oh, tomorrow is your mother's birthday. Do you remember?
B: __2__, I do. How shall we celebrate it?
A: First of all,a birthday present. What about buying her a beautiful sweater?
B: __3__, I think it will make mom happy.
A: Er... Shall we have a special dinner?
B: Yes, dad. How about a Chinese dinner?
A: OK. Don't __4__ to buy a birthday cake and some candles.
B: __5__