题目

Look here, boys and girls! This is a photo1my family. This is my father. His name is2. He is 40 years old. That's my dear mother. 3 name's Linda Smith. She is 38. And these4my grandparents. Who is the girl? She is my5. Her name is Mary.The boy is me. My name is Tim Smith. I love my family. （1） A . at B . in C . of （2） A . Smith Mike B . Mike Smith C . Mike Black （3） A . Her B . His C . Your （4） A . are B . is C . am （5） A . daughter B . friend C . 如图，ABCD是直角梯形，其中AD=12厘米，AB=8厘米，BC=15厘米，且△ADE、四边形DEBF、△CDF的面积相等．△EDF（阴影部分）的面积是多少平方厘米？