It was on June 10 ＿＿＿Shenzhou-10 spacecraft was sent up into space.A. thatB. whenC. at

问题补充：

It was on June 10,＿＿＿Shenzhou-10 spacecraft was sent up into space.

A. that

B. when

C. at that time

D. just then

答案：

(答案→)A. that

B. when

C. at that time

D. just then

解析：句意：那是在的6月10日神州十号宇宙飞船被发射进入太空。这里是强调句型，被强调的是on June 10,；其结构是It was+被强调部分+ that+其他，判断强调句型的方法是把It was that去掉整个句子不缺成分，是成立的。故选A。