2. 外语
  3. After they had finished building the lab，the expert inspected it _______________________(以确保工作质量没有问题)．

After they had finished building the lab，the expert inspected it _______________________(以确保工作质量没有问题)．

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问题 After they had finished building the lab，the expert inspected it _______________________(以确保工作质量没有问题)．
选项
答案to make sure they’d done it properly
解析 考查点：make sure表示“保证，确保”。properly表示…“恰当地，正确地”。
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大学英语六级

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