During the part of the meeting, they mainly discussed the solution to the problem.
A. latest
B. late
C. later
D. latter
网友回答
A. latest
B. late
C. later
(答案→)D. latter
解析：词义辨析。Latest最新的；late晚的，迟的；later后来的，较晚的；latter后一半的。接近终了的；句意：在会议的后一部分，他们主要讨论了对这个问题的解决方法。根据句意说明D正确。