if it is cheap i'll buy it.if__,___

问题描述:

if it is cheap i'll buy it.if__,___
A not,no B.not not C no no为什么选A

if it is cheap i'll buy it.if not,no.
if not,no.是if it is not cheap,I will not buy.
no指代的是"I will not buy"
只有A项符合题意.