Sometimes we should roles so that we can understand each other’s difficulties, thus promoting our cooperation.
A. occupy
B. imitate
C. assess
D. switch
网友回答
A. occupy
B. imitate
C. assess
(答案→)D. switch
解析：动词词义辨析。A占据，使…忙于…;B模仿；C评估；D 转换；句意：有时候我们应该转换角色，这样我们才能够理解对方的困难，提高我们的合作。根据句意说明D正确。