Mark the letter A,B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
I had to clear the spare room before I could start decorating.
A. Not until had I cleared the spare room I could start decorating.
B. Before I cleared the spare room I could start decorating.
C. Only when I had cleared the spare room could I start decorating.
D. Only when I had finished clearing the spare room, I could start decorating.