单项选择题
Although only in his twenties,he was already()bal.
A.runningB.growingC.turningD.going
单项选择题 None of his arguments seemed to me to().
多项选择题 光气及光气化中,装置设有多套安全联锁系统,紧急停工是在事故状态时导致紧急泄压系统自动或手动触发。紧急停工的原则有:()等。
单项选择题 I don't know why he is about to make a()over a few pounds.