问题补充:
_____ for your brother, I would not have gone to see Mr. Wang.
A. If it is not
B. Were it not
C. Had it not been
D. If they were not
答案:
A. If it is not
B. Were it not
(答案→)C. Had it not been
D. If they were not
解析:含有if的虚拟条件句可把if省略,而把had,should,were等提到句首,构成倒装。