A、Yellow and white. B、Blue and green. C、Green and black. D、Blue and black. B根据女士所说的“A blue shirt，and white shoes，carrying a gree

M: No. 11 Police Station. Can I help you?
W: Yes. It’s about my son Leech. He went to the school this morning but hasn’t been back yet and it’s 6: 00 p. m. now.
M: Just a moment, please. May I have his name?
W: Leech Smith, 112 Broadway.
M: Thank you. Now Mrs. Smith, what is the matter exactly?
W: Well, Leech left home at 7 o’clock this morning, but just now her teacher called me and asked why Leech didn’t go to school.
M: Do you think it’s possible that he went to friend’s home?
W: I don’t think so. I called her friends and our neighbors , but none of them had seen Leech today.
M: I see. Now, Let’s move to some details. How old is he?
W: 10 years old. And he is 1.5 meters’ tall.
M: What’s he wearing?
W: A blue shirt, and white shoes, carrying a green school bag.
M: We’ll do our best to find him, Mrs. Smith. Please try not to worry.
17: Where does this conversation most probably take place?
18: How long has Leech been away from home?
19: What’s the color of Leech’s shirt? And what’s the color of his bag?