1. My office, _______ is on the second floor of the building, is very small.
A. which B. where C. that D. this
2. The artist _______ painting you bought is a classmate of mine.
A. from whose B. from whom C. whom D. whose
3. Geometry is a branch of mathematics _______the properties of lines, curves, shapes, and surfaces.
A. concern with B. it is concerned with C. which concern D. that is concerned with
4. Last Saturday I returned to the village _______.
A. that I was born there B. in that I was born C. where I was born D. which I was born in it