单选题 The old bookstore is so messy that customers cannot find any books they want, ______ purchase them.

A. so much
B. much less
C. no less than
D. more or less

【正确答案】 B

【答案解析】[解析] 词汇：副词 1．本题考查比较级派生出的状语从句词汇，先将much less和let alone的用法作简要说明。He cannot speak Korean well, much less (let alone) he cannot speak English He cannot speak Korean well, much less (let alone) English. 别说是英语了，连韩语他都说不好。 2．题目中much less customers cannot purchase them.也是省略了前面的重复内容。同时，原文意思是“别说买书了，连书在哪儿都找不到”。因此B为正确选项。