A、In the ocean. B、On the shores. C、Inside fishes. D、Inside human bodies. D

W: Today, this special edition of our show dives into an ocean of plastic, masses of waste accumulating on and around some remote islands in the Pacific. Now we have an environmental expert Dr. John with us.
M: Thank you for inviting me. Synthetic plastic, the kind made by people, has been around since 1907, and scientists estimate that almost every piece of it made since then still exists.
W: Sounds terrible but why?
M: Because it doesn’t break down quickly in the environment. And researchers say that tons of plastic trash around the world find a way to leak into the ocean every year. It might be picked up on the coast and swept out to sea. It might find its way from streets to storm drains, carried by rivers to the ocean. And you’re about to see its impact.
W: Before we get into the problem,though, what can be done about this? It’s unlikely and probably unaffordable to take plastics out of the environment altogether.
M: Right. On a personal scale, people can reduce the amount of plastics they use. Think water filter bottles or jugs instead of throwaway water bottles.
W: How about using reusable fabric shopping bags instead of plastic ones?
M: That is a wise decision. And when it comes to the plastic you do use and need to throw away, think recycling every time. This will help keep the materials from slipping into the environment.
W: One image that’s hard to forget about how plastic can impact the environment is what you can see in the stomach of a dead bird on a Pacific island.
M: Yes. It is sad to see your coffee cup, water bottle, toothbrush... They may all float miles to end up on the shores, inside those birds, the blubber of these seals, and the sand, and invisibly in the waves these dolphins call home.
W: And eventually, these plastics may well end up inside us.
M: It is quite likely unless we do something right now.
Questions 5 to 8 are based on the conversation you have just heard.
5. What are the speakers mainly talking about?
6. What does the man say about synthetic plastic?
7. Where would plastic trash around the world finally end up?
8. What is the unforgettable image the woman mentioned about?