It was nine o'clock ______ I arrived at the airpo

It was at nine o’clock ______ I got up.~

when
当我起床时已经9点了
其他无此意

选when 这里是时间状语从句，你可以顺着读 When I woke up in the morning，it was nine o'clock.
如果选择that，that本身不能引导状语从句，如果想要理解为定语从句，那么that就要在从句中充当成分，很显然I woke up in the morning已经是个完整的句子了 就算想表达I woke up in the morning at nine o'clock that指代的是nine o'clock 那么介词“at”就不可以省略 然后要把介词提前就是It was nine o'clock at that I woke up in the morning 但是这句也是错的
因为根本不能用 at that 只能用in that来引导从句
还有前面一楼说到的强调句问题
强调句就是去掉“it is/was ……that……”剩下的可以组成一句完整的句子，但是这句缺了at
你去掉“it is/was ……that……”就变成了i woke up in the morning nine o'clock 所以不成立

when在这里引导的是时间状语从句，表示“当,,,,,,时候”。当我到达机场的时候，九点钟了。
that可以引导宾语从句，但要记住，它前面的词一定是动词，此句是o'clock不行。
that还可以引导定语从句，that前面的词叫先行词，与that相连的句子最后要翻译出“的”字，这句话也不能翻译出我到达机场的点钟，不通顺。

除了第一条的回答外， 我想也许你受了‘强调句型’的影响，才想选A。 不过这里是不行的，因为去掉'it's ...that' 后不成为完整句子了。

本句为时间状语从句.

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富川瑶族自治县13093858562： It was nine o'clock - --I woke up in the morning.选that还是when - ？
尤枫小牛： 选when 这里是时间状语从句,你可以顺着读 When I woke up in the morning,it was nine o'clock. 如果选择that,that本身不能引导状语从句,如果想要理解为定语从句,那么that就要在从句中充当成分,很显然I woke up in the morning已经是个完整...

富川瑶族自治县13093858562： 第一句:It was nine o'clock in evening on September15？
尤枫小牛： 66C 67D 68C 69C 70B 71A 72B

富川瑶族自治县13093858562： It was nine o'clock - ---- - I arrived at the airpo - ？
尤枫小牛： 除了第一条的回答外, 我想也许你受了'强调句型'的影响,才想选A. 不过这里是不行的,因为去掉'it's ...that' 后不成为完整句子了.

富川瑶族自治县13093858562： 完形填空. It was seven o'clock on the morning of August 29th.The Kelly family were going to Brighton a town by the sea.   ＂Can we have breakfast 1 we... - ？
尤枫小牛：[答案] 1-5 ACDBB 6-l0 DACBA

富川瑶族自治县13093858562： it's nine o'clock. we are having an english class.哪里错了. - ？
尤枫小牛： It was nine o'clock. We were having an English class.

富川瑶族自治县13093858562： ...looked out of the window and saw some boys - ___(play) soccer on the playground.They talked about their - ____(live) habits.—__ - here in summer —It was ... - ？
尤枫小牛：[答案] Students can't (D.listen to) music in the classroom. The (elephant) is one of Thailand's (symbols).(A.) The girls come(改为... They talked about their (living) habits. —(D.How was the weather) here in summer —It was very hot. I heard someone (D.sing) a ...

富川瑶族自治县13093858562： It was snowing very hard for days.Nicholas's two dogs,Sam and Suzie,had nothing to eat f____aThey knew that things weren't right at home,so yesterday ... - ？
尤枫小牛：[答案] for,because,door,heard,out