You will be able to get good marks ________.A.while you are doing your homework by yourselfB.if you do some revision every dayC.before you begin to study hardD.until you follow your teachers' advice
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B解析思路分析：根据从句与主句的逻辑关系，可判断出从句所表示的是一个条件．按照英语动词时态的呼应原则，主句为一般将来时，条件状语从句应用一般现在时代替一般将来时．其他三个选项填入句中意思不通．