[求助]新东方蓝皮书P236Q7

年华无声

According to entomologists, single  locusts are quiet creatures, but when locusts are placed with others of their species, they become excited, change color, vibrate, and even hurn.

A. when locusts are placed with others of their species,

B. when placing them with others of their species, then

C. locusts, when placed with others of their species,

D. placing them with others of their species,

E. placed with others of their species, then

答案是A, 我想问下E为什么不对

谢谢~

jason_alex

根据前后一致的原则，but前后的主语是一样的，如果选择e，那么placed with的主语以及they都是指代single locusts了，而实际要指代应该是locusts

年华无声

明白了，谢谢~

北极虾仁

E我也一开始选了