单选题
1._______ for the free ticket， I would not have gone to see film so often.
A.If it is not
B.Were it not
C.Had it not been
D.If they were not
正确答案： C
答案解析： 从本题后半句可以看出这是一个与过去事实相反的虚拟条件句，从句中的动词要用“had ＋过去分词”，如果将if省略，had要位于主语之前，构成倒装句，故本题的答案是C.Had it not been for the free ticket ＝If it had not been for the free ticket.