问题补充:
Is that a book on farming?,I want to borrow it.
A. So it is
B. If so
C. So is it
D. So if
答案:
A. So it is
(答案→)B. If so
C. So is it
D. So if
解析:B解析:句意为:那是一本关于农业的书吗?如果是的话,我想借。so it is的确如此,表观点.看法一致;so is it它也是;so if没有这种表达法;if so如果这样。本句是if it is so的省略,故选B。