The plane before they the airport
reached(过去) had taken off (过去的过去 用过去完成时)
请及时采纳,不懂继续问( 天天在线 )为什么不能是C呢,飞机起飞之前他们就到了,同样是过去完成时注意before “在。。。。之前显然从句的谓语动词所表的动作在主句之后
1.A 伴随状语表原因 2.B 主句主语是ours ,也就是our life,因此与their life比较的时候是被比较,用过去分词 3.B 伴随状语表方式 4.D 省略了having been,就是说已经生产出的电脑 ...
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