【题目】To improve their oral English, everyone in the class is supposed to ________ actively in these discussions.
A. participate B. attend C. enter D. take
在线课程【答案】A
【解析】
试题分析：考查动词辨析。动词短语participate in参加；take in吸收，理解，欺骗；attend和enter通常作为及物动词，直接加宾语。句意：为了改善他们的口语，班级里的每个人都应该积极参加这些讨论。故A正确。