题目内容
17．Two weeks passed ______ I received my father's letter．（ ）| A． | before | B． | after | C． | until | D． | as soon as |
分析 在收到爸爸的信后，已经过去两天了．
解答 答案：B．
本题所给选项的意思分别是：before"在…之前"，after"在…之后"，until"直到…才"，as soon as"一…就"．根据题干可知，本句的意思是：收到爸爸的信后，已经过去两天了．故选B．
点评 在做本题是应注意前后动作发生的顺序，正确区分所给选项的意思．
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