When Tom will come back, When Tom comes back, Which one? C.

当汤姆将要回来时，当汤姆回来时选哪一个，选C。

To give you an example, one c.

举个例子，一个c。

It might even have subsets to it so that we could have one A and one B and one C up here.

呈示部本身可能还有自己的结构我们可能还有A部分B部分和C部分。