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.
Q17：Where does this conversation most probably take place？
Q18：How long has Leech been away from home？
Q19：What’s the color of Leech’s shirt？ And what’s the color of his bag？