连词成句。

1. his, looking, dinner, is, he, for (.)

2. last, do, her, she, didn't, homework, night (.)

3. new, learn, Sam, of, has, a, things, to, lot (.)

4. you, the, me, can, way, show (?)

5. an, this, story, interesting, is (.) 

如图所示的甲、乙、丙三种物质均含有相同的某种元素，箭头表示物质间的转化一步就能实现，则甲可能是

①C；②H₂O₂；③Na；④Fe；⑤HNO₃

A．仅①③④

B．仅①②⑤

C．仅①②③⑤

D．①②③④⑤