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~
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