题目内容
9．MH 370began to lose touch with the ground radar（雷达） stations __________ the morning of March 8th．（ ）| A． | in | B． | on | C． | at | D． | from |
分析 MH370在3月8日早上开始与地面雷达站失去联系．
解答 答案：B 根据时间状语the morning of March 8th，可知这是具体到了某一天的早上，用on．in+年、月、季节等；on+具体到某一天；at+时间点；from从…故选B．
点评 本题考查时间介词的辨析．找准时间状语，分清是何种情况是做题的关键．
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