问题
选择题
Our teacher always speaks slowly and clearly in class _____.
A．so as to be understood
B．to have understood
C．so as to understand
D．to understand
答案
答案：A
题目分析：考查固定搭配。so as to do sth="in" order to do sth为了做某事，Our teacher和understand之间是动宾关系，即“老师被同学们理解”，故使用被动语态，排除B、C、D，故选A。