A．half not as much asB．much not as half as

C．not half as much asD．as much as not half

【答案】C

【解析】

试题解析：

句意：太便宜了！这条裙子的价钱还不到衬衫价钱的一半。as．．as的否定式为not as/so +adj．/ adv．+as。故选C。