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题库 / BiChu21-SC-107
Towing insurance provides protection against collision damage to your automobile while being attached, towed, or detached from a covered rental truck, or loaded onto, transported, or unloaded from a covered rental trailer.
while being attached, towed, or detached from a covered rental truck, or loaded onto, transported,
while you are attaching to, towing by, or detaching it from a covered rental truck or while it is loaded onto, transported,
when attached to, towed by, or detached from a covered rental truck or when it is loaded onto, transported by,
while you being attached to, towed by, or detached from a covered rental truck or loaded onto, transported by,
when being attached to, towed by, or detached from a covered rental truck or loaded, transported,
这里讲解得还不错, https://english.stackexchange.com/questions/557697/can-a-pronoun-be-dropped-in-a-list。
主要考察的是while...or的结构对称性。
我也认为这样是正确的：while you are attaching (it) to, towing (it) by, or detaching it from...or while it is loaded onto, transported (by)...
即使括号的2个it可以省略，transported后面的by应该是不能省的。
毕出21套的视频里有讲过这个题，但我还是不太理解句子的意思，尤其是B选项前半部分的while you are attaching to, towing by, or detaching it from is covered rental truck