It is already 10 o'clock.Iwonder how it _____that she was tw

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It is already 10 o'clock.Iwonder how it _____that she was two hours late on such a short trip.
答案是came about 即”发生”,但是我认为came up也可以,它们都有发生的意思,有什么区别呢?

1.come about 发生,产生,出现
无被动语态.
记住这一点：
常用句型：How did it come about that从句?“.事是怎么发生的?”
2.come up v.
1）走近,上来,发芽,流行,发生,被提出
2）上升,讨论,出现
如：Please come up to me!
The problem came up at the meeting yesterday.

1.It's already ten o'clock.I wonder how it _____that she was It's already 10 o'clock.I wonder how it___that she was two h 1.It's already 10 o'clock.I wonder how it_____that she was h It’s already 10 o’clock.I wonder how it ___________ that she It was already two o'clock when I()London. It is eigth o'clock.在句中添加already _____that it was going to rain,she hurried home it was already ten o'clock ------ we got to the museum this 用连词填空1.it was already eight o'clock -------we got there.he h It was already ten o’clock __he got back home.Awhile B when It was already eight o'clock＿we got there.为什么填whenever,不填whe It is nine o clock .