Is that a book on farming?,I want to borrow it.A. So it isB. If soC. So is itD. So if

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

A. So it is(答案→)B. If soC. So is itD. 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。

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