2. 职称英语
  3. Only (within) the past 200 years (scientists have) found (out what) fire (is).A、

Only (within) the past 200 years (scientists have) found (out what) fire (is).A、

游客2025-03-17  25
问题 Only (within) the past 200 years (scientists have) found (out what) fire (is).
选项 A、within
B、scientists have
C、out what
D、is
答案 B
解析 “only+状语”置于句首时，句子倒装。改“scientists have”为“have scientists”。
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