2. 专升本
  3. Earthworms occur( )adequate moisture and food and the necessary soil conditions are found.

Earthworms occur( )adequate moisture and food and the necessary soil conditions are found.

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问题 Earthworms occur( )adequate moisture and food and the necessary soil conditions are found.
选项 A、and
B、whenever
C、however
D、whatever
答案B
解析
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