We have waited ____ (介词)you (等你)long enough.
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They are ____ (介词)odds(意见不合)with each other.
We () (seldom be) (请调整为合适的形式和顺序)late for school.
It ____ (动词的合适形式)him(花费了某人多长时间) 10 days to make this model.
Don't forget to make a contribution ____ (介词)(为 ...... 做出贡献) your country when you return.