Let's start our work at nine tomorrow morning(划线部分在at nine tomorrow morning)用when shall we 还是when let we?

Let's start our work at nine tomorrow morning(划线部分在at nine tomorrow morning)用when shall we 还是when let we?
Let's start our work at nine tomorrow morning(划线部分在at nine tomorrow morning)
用when shall we 还是when let we?

Let's start our work at nine tomorrow morning(划线部分在at nine tomorrow morning)用when shall we 还是when let we?
用when shall we

shall

When shall we 表将来时。

用when shall we...... ?

When shall we start our work?