28-21: 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 hum.>>
A: when locusts are placed with others of their species,>>
B: when placing them with others of their species, then
>从句里的分词省略结构中 , 逻辑主语和主语不一志 placing 应用被动>
C: locusts, when placed with others of their species,
结构不明确 句中已有主语 they
D: placing them with others of their species,
用被动
E: placed with others of their species, then
从句没主语 |