大学英语四六级考试新题型分析答:常用的词汇和词组:required, compulsory, elective, selective, optional, course, description, catalog, bulletin, prerequisite course(预修课程), preliminary course(预备课程), such a heavy load, excellent reputation, drop a course(退修课程)等。 (3)补课场景 场景人物:同学之间补课。 场景涉及的内容:通常...