《prep语法笔记》65 中floor单复数的疑问，大家来说说

swimswan

Developed by Pennsylvania's Palatine Germans about 1750, they made Conestoga wagons with

high wheels capable of crossing rutted roads, muddy flats, and the nonroads of the prairie and they had a floor curved upward on either end so as to prevent cargo from shifting on steep grades.

(D) Conestoga wagons had high wheels capable of crossing rutted roads, muddy flats, and the nonroads of the prairie, and a floor that was curved upward at both ends to prevent

正确选项是D

请问单独把主语和and后的平行成分拿出来，那就是
Conestoga wagons had a floor (that was curved upward at both ends to prevent ...)
请问，wagons怎么会只有a floor呢？

mizhao14

同问同问，困扰了我好久！！！！

davidkim12

是啊 再一次做这道题突然发现这个问题