She thought ____ impossible to finish so much work in a day. [ ]

Tonny’s parents thought he was at school, but ________ he was in a net bar.

________ is that man— You don’t know him He is Ma Yun.

It’s very kind ______ you to help me ______ math project.

To my great surprise, when I entered the cinema and took my seat, I found the person sitting nextto me _________ be my brother.[ ]