单选题 Why is there ______ traffic on the streets in January than in July?

【正确答案】 A

【答案解析】[名师精解] traffic为不可数名词，只能用little限定。又由句中than可知须用比较级，所以用less。
[解题秘籍] little；less用于不可数名词，few，fewer用于可数名词。