第24题: [单项选择]The teacher recommended that Jack______ math or physics instead of English because he was quick at numbers. A. must study B. could study C. study D. studied 参考答案:C 答案解析:语法题。考核点为虚拟语气。recommend后的宾语从句中要用虚拟语气,动词形式为:(should)+do。故答案为C。句意:老师建议学习数学或者物理,而不是英语,因为他对数字很敏感。