A、On June 2. B、On July 5. C、On July 2. D、On May 1. C对话中，男士问女士什么时候出发，女士回答到7月2号，故答案为C项。

M：Hello, Alice. The summer vacation is coming. Do you have any plans?
W：Yes. My family are planning to visit Beijing this summer vacation.
M：Where are you going to visit?
W：We’re going to visit the Great Wall and the Forbidden City.
M：Why don’t you go to the Beihai Park? It’s quite beautiful. It’s one of the oldest and largest gardens in China.
W：Sounds good.
M：When will you leave and how will you get there?
W：We will leave on July 2 and we will go by plane.
M：I hope you will have a good time there.
W：Thank you.
17. What is the woman going to do this summer vacation?
18. Where does the man suggest the woman to visit?
19. When will the woman leave?