Question 6 is based on the conversation you have just heard.

W: We have a full load of goods that needs to be delivered. But we can’t get a container ship anyway.

M: That’s always being a problem in this port. The facilities here are never able to meet our needs.

Q: What are the speakers talking about?

对话中女士对男士说她们有一大批货物需要运走，但怎么也找不到集装箱船只，男士表示在这个港口，此类问题一直存在，港口的设施根本满足不了人们的需求。由此可知，两人讨论的是港口缺乏集装箱船只的问题。选D。