应该选 D．when
因为前面的 moment 是指的时间
that 是引起从句的； 如果要用 that ,则 应该是这样的：One of the glorious moments in my school life was that when I was awarded the Mayor’s Award．
这是海淀区高三二学期的题,我查了答案,就是 D．when
The parking rules in public places should be observed strictly,otherwise you will get a
ticket 公共场所的停车规则应该严格遵守,否则你就会收到罚单