试题题干
Translate the following sentence into Chinese.
The big question is how these work and where they are located in the bird's body.
参考答案
试题解析
考点：big question大问题；locate in 安置在···；bird's body鸟的身体。
句子结构：主语为The big question，系动词is，how···和where···为表语从句。