完成对话。

P: Can you 1______ a description of the man you are trying to find?

M: Yes, he is about the same age 2______ I am. He is very tall.

P: I have some pictures. Look, does any one of these look like him? What 3______ this man?

He is a man 4______ is as old as you and who is very tall.

M: No, it wasn't 5______. The man I'm looking for 6______ black hair.

P: Was 7______ long?

M: No, he has hair that is very 8______, and has very small nose.

P: Can you remember anything 9______ about him?

M: Yes, he has eyes that are very big and a face that is round.

P: How about his mouth?

M: Oh, his mouth is very small.

P: Is this 10______ man you are looking for?

M: Yes, that's him! That's the man.

（14分）A、B、C、D四种元素处于同一周期。在同族元素中，A的气态氢化物沸点最高，B的最高价氧化物对应水化物的酸性在同周期中最强，C的电负性介于A、B之间，D与B相邻。（1）C原子的价电子排布式为___________________

（2）A、B、C三种原子的第一电离能由大到小的顺序是（写元素符号）_____      。

（3）B的单质分子中存在①    个键；D的最简单气态氢化物分子中的中心原子轨道采用②      杂化。B和D形成一种超硬、耐磨、耐高温的化合物，该化合物属于③_______晶体，其硬度比金刚石

④          （填“大”或“小”）。

（4）A的气态氢化物的沸点在同族中最高的原因____________________________     。