It was on Tuesday evening I finished the experiment.
A. which
B. when
C. while
D. that
网友回答
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。