第24题: [单项选择]______ he will leave for Beijing. A. It will not be long before B. It is before long that C. It is before long D. It was before long that 参考答案:B 答案解析:[考点] 强调句 [解析] 受思维定式的影响而容易错选A。如果before引导一个状语从句,状语从句的谓语动词应用一般现在时表示将来,故A明显是错误的。状语从句的时态是一个常考点,主要考查时