单选题 Twenty dollars ______ obviously too much to pay for such a small item.
A. were B. are C. is D. have been

【正确答案】 C

【答案解析】[解析] 本题考查的是主谓一致的用法。复数名词或短语表示时间、价格、数字、度量衡等，它们作为一个单一的概念时，其谓语动词要用单数形式。如：
(1) 15 miles is a good distance.
(2) Six times four makes 24.
[译文] 买这样一个小物件，20美元明显太多了。