题目

阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，故答案选取可以填入空白处的最佳选项。 It is a blue, cotton shirt. The shirt belonged to my1David. On his birthday before he left college, his mother bought him the shirt.2I gave him free use of my bike, he let me wear the shirt, occasionally. We shared the shirt, and as days3, we shared more of our stories. David was in school by scholarships and grants (助学金). He4to keep his scholarships, because without even one of them, he would have to5and back on the farm. And in David's home, there was al(7分)据右图回答问题。 (1)写出各序号所示结构的名称。  ①        ，②                ，③           。 (2)在①②③这三部分结构中能进行气体交换的是           。鸟类的身体有发达的              ，这些          端与肺相通，分布在               之间，有的还突人到骨的空腔里。