Animal experts in Croatia say a bear has learned how to trick people to let him in by knoc

Animal experts in Croatia say a bear has learned how to trick people to let him in by knocking at the door.
They believe the 220- kilogram brown bear probably learned the trick while nudging (轻推) a door to get it to open.
Experts have a guess that the nudging was mistaken by the owners for knocking and that the bear, pleased by the result, repeated the trick.
The Loknar family from Gerovo in western Croatia said the bear had knocked at their door three times and they were now refusing to answer the door.
‘‘We jumped out of the window as he came in through the door and went into the kitchen to take some food for the first time.” Mum Nevenka Loknar told a reporter from a local newspaper. “I opened the door and saw him standing there and I didn’t believe my eyes at first, then I ran for it as he walked in as if it was the most normal- thing in the world.”
Bears are a common thing in the woods around here, but no one has ever heard of a bear that knocks at the door.
Mum Nevenka Loknar said, “The bear is so intelligent. It’s incredible. We’ve tried to put up lots of obstacles to stop him coming in, like a wire fence but he still gets through. I wouldn’t be surprised if he knew how to use wire cutters.”
【小题1】According to experts in Croatia, how did the bear learn the trick? A．By knocking at the door several times.B．By accident.C．By learning from the owner of a family.D．By imitation.【小题2】What does the underlined word “it” in paragraph 5 refers to?A．Eating at the kitchen.B．Knocking at the door.C．Walking into the house. D．Answering the door.【小题3】It is in Gerovo that a bear knocks at the door.A．unusualB．a troubling problemC．common D．an exciting experience【小题4】Mum Nevenka Loknar was surprised that the bear .A．didn’t attack her familyB．knew how to use wire cuttersC．jumped across her wire fence three timesD．was clever at getting through the obstaclesB

(答案→)B 解析：本文叙述了克罗地亚的动物专家说熊学会了敲门来让它进去，专家猜测可能熊是偶然学到的，后来人们给它设置一些障碍，它照样能通过障碍，人们认为它是非常聪明的，难以让人相信。【小题1】细节理解题。根据Experts have a guess that the nudging was mistaken by the owners for knocking and that the bear, pleased by the result, repeated the trick.被熊偶尔学到的，故选B。【小题2】词义猜测题。根据I ran for it as he walked in as if it was the most normal- thing in the world.故选C。【小题3】细节理解题。根据Bears are a common thing in the woods around here, but no one has ever heard of a bear that knocks at the door.故选A。【小题4】细节理解题。根据最后一段可知Mum Nevenka Loknar很吃惊看到熊能通过障碍，故选D。

谢谢解答