There is no ____ that 100 years ago animal testing was cruel, but today animals in experiments are very well taken care of

下列句式不同于其他各句的一项是（ ）

Only the factory ____yesterday ____ this kind of machines.

The fire started on the second floor and it wasn’t long ______ the whole building was burned down

We promise that we will never forget the human _______. We all love to live in peace.