号称超难的700-800 SC一道题求解

lanadelrey

Alpacas' fleece is worth surprisingly little compared to their market value; a top breeding specimen bringing upwards of $100,000 even if five pounds of fleece fetches only $80 to $240.  
A Alpacas' fleece is worth surprisingly little compared to their market value; a top breeding specimen bringing upwards of $100,000 even if five pounds of fleece fetches
B Alpacas' fleece is worth surprisingly little in comparison with its market value; a top breeding specimen bringing upwards of $100,000 while five pounds of fleece fetches
C The fleece of the alpaca is worth surprisingly little compared to its market value, while a top breeding specimen can bring upwards of $100,000 even though five pounds of fleece fetch
D The fleece of the alpaca is worth surprisingly little compared to the animal's market value; a top breeding specimen can bring upwards of $100,000 while five pounds of fleece fetch
E The worth of the alpaca's fleece is surprisingly little compared to the animal's market value; a top breeding specimen can bring upwards of $100,000 even though five pounds of fleece fetches


这道题的答案选D，但是我却有疑虑，D选项中five pounds用的是fetch，可是计量单位如金钱、重量、距离不应该都用单数形式的动词吗？
上曼哈顿论坛看了一下，有的人说都可以，但是Ron说这里是不对的应该用单数fetches

长丝弓

D选项没错

表示具体重量的不可数名词作主语时，谓语动词通常用复数。如：

More than 250tons of oranges are expected to be harvested this year in the county. 这个县今年可望收获250多吨柑桔。（《薄冰高级英语语法》）

Several kilos of crack were found in her luggage. 在她的行李中发现了几公斤的强效纯可卡因。（《剑桥高级英语词典》）

Over 150,000 tons of waste are dumped annually along the coastline. 每年有150,000多吨垃圾被倒在海岸线上。（《麦克米伦高阶美语词典》）