We see lighting (before we hear) the thunder (because) sound travels (more slowl

游客2025-03-17  2

问题 We see lighting (before we hear) the thunder (because) sound travels (more slowly) than (light is).

选项 A、before we hear
B、because
C、more slowly
D、light is

答案 D

解析 改为light does.比较项是动词travel,故重复的话应用助动词does.
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