7213 - Intermediate\Upper-Intermediate Test:10 - I was _____ work when thieves broke _____ our house.

I was _____ work when thieves broke _____ our house.
in / in
on / to
at / in
at / into
Table of English Grammar Contents (All Levels)
Pre-Intermediate Grammar Exercises
Upper-Intermediate Grammar Exercises
Elementary Grammar Exercises A1