2. 外语
  3. In a research laboratory, teams of workers ______investigate a problem.

In a research laboratory, teams of workers ______investigate a problem.

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问题 In a research laboratory, teams of workers ______investigate a problem.
选项 A、systemize
B、systematic
C、systematically
D、system
答案C
解析 The adverb systematically modifies the verb investigate.
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