It was on Tuesday evening I finished the experiment. A. whichB. whenC. whileD. that

问题补充：

It was on Tuesday evening I finished the experiment.

A. which

B. when

C. while

D. that

答案：

A. which

B. when

C. while

(答案→)D. that

解析：考查强调结构。强调结构：It is/was+被强调部分+that/who(指人)+其余部分。其判断依据是去掉强调结构，句子依然成立。题干去掉强调结构后是I finished the experiment on Tuesday evening.句子成立，所以是强调结构，因此选择D。