Do you mind _____ such a long way to work every day? 

A. motivated

A. You had better sit down.

B. You are allowed to sit down.

C. You are necessary to sit down.

A. It would be a lovely room if its view were difficult.

B. Provided the room had a difficult view, it would be a lovely room.

C. But for its difficult view, it would be a lovely room.

D. Unless the room has a difficult view, it won't be a lovely room. 

A. were

A. When I knew that my mother's vase was missing, I picked some roses.

B. It was not until I had picked some roses did I notice my mother's favorite vase was missing. 

C. Only when I had picked some roses that I noticed my mother's favorite vase was missing.

D. I picked some roses and only then did I notice that my mother's favorite vase was missing.

A. to