2. 外语
  3. He finished the task on his own,______effecting a considerable saving in time and money.

He finished the task on his own,______effecting a considerable saving in time and money.

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问题 He finished the task on his own,______effecting a considerable saving in time and money.
选项 A、thereafter
B、thereof
C、therefore
D、thereby
答案D
解析 thereby doing sth．，意为“因此，由此，从而”，如：Diets that are high in saturated fat and cholesterol tend to clog up our arteries，thereby reducing the blood flow to our hearts and brains．高饱和脂肪和高胆固醇的饮食阻塞我们的动脉，因而减少了流人心脏和大脑的血液。
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