患者，1周前因外伤折断前牙，已经过根管治疗。检查：左上1冠折，断面在龈上，无叩痛，无

The world of out-of-doors is full of secrets. And they are so interesting that quite a lot of people are busy studying them. All around us are birds, animals, trees and flowers. The facts about how they  1  and grow are as interesting as anything could be. Do you know that one of the greatest presidents of the USA spent hours and hours  2  birds? A businessman who lives near New York city became so  3  in insects that he began to collect them. He now has more than one thousand different kinds carefully  4  in glass boxes. Come then with me, and I will help you find some of nature’s secrets. Let us go  5  through the woods and fields. Here we shall find how a rabbit tells the other rabbits that there is danger. We shall  6  a mother bear and her young ones as they look for  7  and get ready for winter sleep. We shall watch bees dancing in the air to let other bees know  8  they can find food. I will show you many other interesting things, but the thing that I can  9  you is to keep your eyes and ears  10  when you go out of doors. Nature tells her secrets only to people who look and listen carefully.

小题1:	A．bear B．live C．speak D．fly

小题2:	A．studying B．eating C．learning D．finding

小题3:	A．friendly B．carefully C．busy D．interested

小题4:	A．locked B．kept C．put D．filled

小题5:	A．near B．quickly C．quietly D．politely

小题6:	A．hear B．follow C．catch D．help

小题7:	A．food B．fruit C．vegetables D．water

小题8:	A．how B．why C．where D．when

小题9:	A．make B．pass C．give D．teach

小题10:

A．closed B．open C．safe D．clean