下列现象可以用光的折射解释的是 （     ）

A．在游泳池边看到的池底比实际浅

B．夜晚看到人在路灯下形成的影子

C．平静的水面倒映着蓝天白云

D．晴朗夏日的中午，在树下看见圆形的光斑

One day while a girl was walking in the woods she found two starving songbirds. She took them home and put them in a small (16) She cared for them and felt great love for them.
Once the (17) and per of the two birds flew from the cage. Therefore, (18) he flew close, she grasped him (19) She felt glad, but suddenly she felt the bird go limp. She opened her hand and (20) in horror at the dead bird.
She noticed the other bird moving back and forth on the edge of the cage. She could feel his great need for (21) She lifted him from the cage and (22) him softly into the air. The bird circled once, twice, three times.
The girl watched delightedly at the bird’ s enjoyment. Her heart was no longer (23) with her loss. Suddenly the bird flew closer and (24) softly on her shoulder. It sang the sweetest melody that she had ever heard.
The fastest way to (25) love is to hold on it too tightly, while the best way to keep love is to give it WINGS!

Ⅱ. 完形填空

A．gain

B．give

C．lose

D．show