根据句意和汉语注释，在标有题号的横线上写出单词的正确形式。

小题1:Xu Song, a 27-year –old young man , is_____________(认为) as a talented singer .

小题2:We are having a party to celebrate Betty’ s               （二十）birthday.

小题3:—Dad, perhaps you can buy an iPhone.

— What bad __________ (建议)it is! You know I only support Chinese products.

小题4:— Do you know the Chang’e -3 moon rover（登月车）Yutu landed on the moon_____________（成功）?

—Of course ! We are really proud of that!

已知1~18号元素的离子aW³⁺、bX⁺、cY^2-、dZ^-都具有相同的电子层结构，下列关系正确的是[ ]

A．离子的还原性：Y^2-＞Z^-

B．质子数：c＞b

C．氢化物的稳定性：H₂Y＞HZ

D．原子半径：X＜W