托福 tpo 6 阅读!certain fossils always appears in more ancient sediments,while others begin to be seen as the strata become more recent.这句话后面是不是 有两个动词?begin 和 become 还是 有省略呢?

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托福 tpo 6 阅读!certain fossils always appears in more ancient sediments,while others begin to be seen as the strata become more recent.这句话后面是不是 有两个动词?begin 和 become 还是 有省略呢?
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托福 tpo 6 阅读!certain fossils always appears in more ancient sediments,while others begin to be seen as the strata become more recent.这句话后面是不是 有两个动词?begin 和 become 还是 有省略呢?
托福 tpo 6 阅读!
certain fossils always appears in more ancient sediments,while others begin to be seen as the strata become more recent.
这句话后面是不是 有两个动词?begin 和 become 还是 有省略呢?

托福 tpo 6 阅读!certain fossils always appears in more ancient sediments,while others begin to be seen as the strata become more recent.这句话后面是不是 有两个动词?begin 和 become 还是 有省略呢?
没问题,从句.
as不做成分引导的从句,相当于that

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