甲、乙二人在操场的400米跑道上练习竞走，两人同时出发，出发时甲在乙的后面，出发后6分钟甲第一次追上乙，22分钟时甲第二次追上乙，假设两人速度都保持不变，并继续保持竞走状态．
-- I think your wife doesn't understand you.
-- On the c____, she understands me very well.
My brother is going _________ to be a doctor.
81300 83010 80031 38001 83001
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