A hiker walking at a constant rate of 4 miles per hour ispassed by a cyclist traveling in the same direction along the same path at aconstant rate of 20 miles per hour. Thecyclist stops to wait for the hiker 5 minutes after passing her, while thehiker continues to walk at her constant rate. How many minutes must the cyclist wait until the hiker catches up?
“Thecyclist stops to wait for the hiker 5 minutes after passing her ” 要点是这一句!wait for the hiker 5 minutes after passing her 的意思是在pass her 5分钟后开始等hiker作者: zhangluE 时间: 2011-1-28 20:41
而不是说等了5分钟作者: lenghongmin 时间: 2011-2-13 21:01
楼上正解。如果是等了五分钟应该是wait for 5 minutes。如果是wait for sb+时间,时间是指一个时间状语,表示一个时间点,而不是时间段作者: huangsiyan 时间: 2011-2-14 06:38
哎,还是语法不好啊.............
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