题目内容
10．He started early in the morning，so I guess it ___ long before he phones me about his arrival．（ ）| A． | won't be | B． | wasn't | C． | isn't | D． | hasn't been |
分析 他早上很早就出发了，因此我想过不了多久他就会打电话告诉我他的到达．
解答 答案：A，
it won't be long before…是固定句式，意思是"过不了多久就…"，在句中，before引导时间状语从句，该句中从句中用的是一般现在时，主将从现，所以主句应该用一般将来时，所以本题选择A．
点评 考查时态除了了解明显的时间状语从句，还要学会分析句中隐含的条件，比如，从句中的时态．
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