_________ for the free tickets, I would not have gone to the films so often.
A. If it is not B. Were it not C. Had it not been D. If they were not
_________ for the free tickets, I would not have gone to the films so often.
A. If it is not B. Were it not C. Had it not been D. If they were not
C
从句中省略了if,要倒装。