短文首字母填空。 （共10小题，每小题1分，满分10分）

“You are welcome to have d__小题1:_ with me on Sunday,” said John.

“But I don’t know w___小题2:__ your house is,” said Henry. "It’s e___小题3:__ to find. You get off the bus. Then c___小题4:__ the road, and take the first t__小题5:__ on the left. Walk for five m___小题6:__. Then you’ll see a big tree. Take the s___小题7:___ turning on the right after the tree. Walk about a hundred metres down this road. There is a big red house. Go p___小题8:__ the big house about five hundred metres, and you’ll see a small y__小题9:__ house beside a little tree. Open the door with your foot.”

“With my foot?” said Henry.

“Yes,” said John. “Well, you won’t c_小题10:__ to my house empty-handed(空手地), will you?”

A、B、C为三种短周期元素，A、B在同周期， A、C的最低价离子分别为A^2-和C^-，B²⁺和C^-具有相同的电子层结构。下列说法中，正确的是[ ]

A．原子序数：A＞B＞C

B．原子半径：A＞B＞C

C．离子半径：A^2-＞B²⁺＞C^-

D．原子最外层电子数：A＞C＞B