2. 外语
  3. (Fossil) records support the assumption (which) microorganisms (were) the first forms (of life).

(Fossil) records support the assumption (which) microorganisms (were) the first forms (of life).

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问题 (Fossil) records support the assumption (which) microorganisms (were) the first forms (of life).
选项 A、Fossil
B、which
C、were
D、of life
答案B
解析
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