They were in time to produce carbon,.,which were to make the eart_英语解答

They were in time to produce carbon,.,which were to make the earth's atmosphere.
which 后面的were to make是be to do 是表示将要,

人气：121 ℃　时间：2019-08-21 04:59:40

解答

这和那个关联不是重点,这里的were to do 只是对which 指代的句子作谓语来解释说明,可以做目的来理解,“它们及时的产生CO2,来组成地球的大气.”