【题目】The students were very happy when they found that their English teacher ________ a movie for them.
A. had prepared B. prepared
C. will prepare D. is preparing
在线课程【答案】A
【解析】
试题分析：句意：当学生们发现他们的英语老师为他们准备了一场电影时，他们非常高兴。这里动作prepare准备发生在were happy之前，故用过去完成时。故选A。