问题
选择题
Our English teacher , having explained to us how to design a project, allowed us a whole week’s preparation and then ______the class.
A．to dismiss
B．dismissed
C．dismissing
D．having dismissed
答案
答案：B
题目分析：考查动词时态。句意：我们音乐老师，和我们解释了怎么设计一个项目后，允许我们一周的准备时间，然后下课了。根据主句动词allowed为一般过去时态，and后的动作是顺成关系，故也用一般过去时。选B。
