2744.(1)Where does the conversation probably take place? A.At a hotel. B.At the customs. C.At a travel agency. (2)Why does the woman want to keep the man's passport? A.To follow the practice. B.To record the details later. C.To make a copy of it.
2745.It may seem crazy when you watch your dog bury his bone,only to dig it up a day or two later. (1)
It is simply in their nature.For thousands of years,dogs have buried their bones.The practice itself started long before dogs were even pets when their ancestors had to bury bones to survive. (2)
If they were able to find meat and bones,dogs became very protective of them.To keep other dogs and animals from stealing their meat and bones,dogs would bury them in the ground.When it was time for the next meal,they would dig up their bones and enjoy them again. Although most dogs have plenty of food to eat today,their instincts(本能) still tell them to bury their bones.Some dogs hide more than one at once,burying one and digging up another. (3)
So how do dogs decide where to bury their bones?A dog cannot bury a bone just anywhere. (4)
This includes using his nose to sniff (smell) out a spot that is free from meat-eating animals.Once the dog finds the satisfying spot,he uses his front paws(爪) to dig the hole,drops in the bone and covers up the hole to protect it. (5)
Thankfully,dogs have an excellent sense of smell.A dog can smell a bone though it has been buried for years.Dogs can find bones buried by themselves as well as by other dogs.
A.He must first find the perfect spot. B.This can leave a backyard full of holes and bones. C.Dogs use their nose to find a spot to bury their bones. D.But there is actually a reason behind why dogs bury their bones. E.Therefore,it's the dogs' instincts that tell them to bury their bones. F.When dogs lived in the wild,sometimes there was not enough food. G.Unfortunately,sometimes dogs do not always remember where a bone is buried.