题目内容：

根据对话内容，从方框内选出能填入空白处的最佳选项，其中有两项为多余选项。

A: Look at that strange thing, Wei Hua! What’s that?

B: It’s a key. 1.           

A: Our autobike (电动自行车)? 2. 

B: It was invented by my father. It’s a battery-operated（电池驱动的）machine.

A:   3. 

B: It’s used for riding or flying.

A: Flying? __4.____

B: You can just ride it like a autobike and it will fly as it goes faster enough.

A: ___5.___ I think your father is so great!

B: I think so. He has invented many things.