Question

【题目】—Hi, Bob! What's going on over there?
—Oh, Tom and Dick are playing chess, with a crowd of students watching them.
A.happening
B.appearing
C.working

Answer 1

【答案】A
【解析】happening 发生，appearing 出现，working 工作。句意：“Bob！那边发生什么事情了？”“Tom和Dick正在下象棋，一群学生正围着观看呢。”短语be going on意为“发生；进行”，与动词happen同义，故选A。