典型语境题分析一例请看下面这道题：“How long have you been an actor?” “_______ 1995, when I graduated from college.”A. After B. InC. From D. Since【分析】最佳答案为D。几个干扰项均有可能误选。若仅从答句来看，四个答案都说得过去。但若结合问句的语境以答案应选D，因为其余三选项填入空格均不能回答问句所提出的问题。比较：“When did you became an actor?” “_______ 1995, when I graduated from college.”A. After B. InC. From D. Since此题选B，因为问句问的是when(何时)，所以用 in 1995 来回答便顺理成章。请再看两题：(1) “How long have you worked on the farm?” “____ the end of last year.”A. In B. ByC. At D. Since答案选D，用 since the end of last year 回答 how long，即问句问“工作了多久”，答句说“自去年年底至今”。(2) “How long will you work on the farm?” “____ the end of next year.”A. In B. ByC. At D. Since答案选B，问句问“将工作多久”，答句说“工作明年明底”。(3) “When did you leave the farm?” “____ the end of last year.”A. In B. ByC. At D. Since答案选C，问句问“何时离开”，答句说“去年明底离开”。

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