It was on June 10,2013＿＿＿Shenzhou-10 spacecraft was sent up into space.
| A．that | B．when | C．at that time | D．just then |
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It was on June 10,2013＿＿＿Shenzhou-10 spacecraft was sent up into space.
| A．that | B．when | C．at that time | D．just then |
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