Copy the expression___, please, without any change.

Mark needs to learn Chinese _______ his company is opening a branch in Beijing. 

Nobody knew that the reason______ he was often blamed. Perhaps that was______ he made the same mistakes told several times.

This is such a wonderful film ___ we have never seen.

Now my idea of a university is still ______ it was ten years ago, a center of cultural life and a resource for the entire community.