is more important is ...
ismoreimportantisastheearthcooleddown,waterbegantoappearonitssurface.A．What/thatB．Tha...
is more important is as the earth cooled down, water began to appear on its surface. A．What /that B．That/what C．What / what D．That / that
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| A |
| 本题考查名词性从句。第一个空是一个缺少空语的主语从句，第二空是一个表语从句，表语从句又是一个as引导的时间状语从句。因此答案是A。 |
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