What about ____ (go) to the Great Wall for our summer holiday?

That picture ________ a mountain is mine.

表是元素周期表的一部分，回答下列有关问题：

族 周期	ⅠA	ⅡA	ⅢA	ⅣA	ⅤA	ⅥA	ⅤⅡA	0
2					①		②
3	③	④	⑤	⑥		⑦	⑧	⑨
4	⑩	⑪					⑫

f（x）= $\{\begin{array}{c}\left(3a-1\right)x+4a，\left(x<1\right)\\ -ax，\left(x\ge 1\right)\end{array}$ 是定义在（﹣∞，+∞）上是减函数，则a的取值范围是（   ）

选词填写    Thomas Edison was a great American inventor（发明家）. When he was a child, he was always ____ questions and trying out new ideas. No matter how hard it was, he never gave up.
    Young Tom was in school for only three months. His teacher didn't understand why he had ____ many strange questions. Most of them were not about his lessons. The teacher didn't want to teach Tom any ____ . He asked Tom's mother to take the boy home. Tom's mother____ him to read and write, and she found him be a very good pupil. He learnt very fast and became very ____ in science.