英语翻译
问题描述：
英语翻译
in a test consisting of 30 multiple-choice questions,3 marks are awarded for a correct answer,2 marks are deducted for a wrong answer and 1 marks is deducted if the question is unanswered.Mary had attempted 20 questions and all answers were correct.Sue had attempted 28 questions but only 24 answer were correct.
答
in a test consisting of 30 multiple-choice questions,3 marks are awarded for a correct answer,2 marks are deducted for a wrong answer and 1 marks is deducted if the question is unanswered.Mary had att...