问题
选择题
Mr zhang speaks very loudly ___ all the people can hear him clearly.
A．while
B．until
C．because
D．so that.
答案
答案：D
题目分析：句意：张先生说话声音大以便于所有的人都能听清楚他的话。A. while当B. until直到C. because因为D. so that结果，以便于.，根据句意，故选D。