prep07 65

anye199117

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.
(A) 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
(B) they made Conestoga wagons, which had high wheels capable of crossing rutted roads, muddy
flats, and the nonroads of the prairie, and floors curved upward on their ends so that they prevented
(C) Conestoga wagons, with high wheels capable of crossing rutted roads, muddy flats, and the
nonroads of the prairie, and had a floor that was curved upward at both ends to prevent
(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
(E) Conestoga wagons had high wheels capable of crossing rutted roads, muddy flats, and the
nonroads of the prairie and floors curving upward at their ends so that it prevented

D正确 但是D中“, and a floor that was ……” 不是and之前有逗号的话， and之后就要有主语了嘛？？

anye199117

但是 麻烦你看一下 prep07 的63题 提后有对于D选项的解释~他是这样说的“(D) and前面有逗号,说明and后面应该是一个完整的句子,应该补出主语they,但这样会使得句子变得复杂,直接去掉逗号构成动词的并列更好;比较双方不对等,emergency calls和emergency operators没有可比性
”　为啥啊？

anye199117

(D) and前面有逗号,说明and后面应该是一个完整的句子,应该补出主语they,但这样会使得句子变得复

杂,直接去掉逗号构成动词的并列更好;比较双方不对等,emergency calls和emergency operators没有

可比性