题目内容：

    Inaccessible Island is well named. It is an uninhabited rock in the South Atlantic ocean. Go there, though, and you will find its coast is covered with litter.

That has been the experience of Peter Ryan of the University of Cape Town, in South Africa. Since 1984 Dr. Ryan has been visiting Inaccessible, recording the litter stranded on the island's beaches. This week, he has published the results.

Though Inaccessible is indeed remote, the nature of oceanic circulation means that this is exactly the sort of place where floating rubbish tends to accumulate.

Dr. Ryan and his colleagues focused on one particular class of litter: bottles. Their definition of a bottle included jars and containers, and things made of metal, glass or polymer. Most, though, were of polyethylene terephthalate , a light plastic.

A particular advantage of picking bottles to investigate is that they are often stamped with their country of manufacture. That enabled Dr. Ryan to analyze the history of oceanic littering. He analyzed the proportions of bottles from various geographical sources. In 1989 the preponderance (优势) of them (67%) was South American. Twenty years later, in 2009, bottles made in Asia contributed more or less equally (44%) with South American ones (41%). By 2018 the overwhelming (压倒性的) majority (74%) were Asian.

This geographical shift speaks volumes. The first sample suggests most litter arriving on Inaccessible had been washed off the land or dropped from coastal shipping — South America being a relatively nearby continent. The other two, with their rising proportions of rubbish from Asia, which is too far from the island for it to have floated there, strongly suggest it was crews’ empties being flung from ships. Such littering is banned — which, ironically, came into force in 1989. But evidently a lot of ships’ captains do not care. They permit the dumping of rubbish over the side, regardless.

1.What leads to litter gathering on Inaccessible Island?

A.The natural phenomenon of ocean currents. B.Too many people’s activities on the island.

C.The litter’s floating around the island. D.The island’s remote location.

2.Why does Dr. Ryan choose bottles as subjects?

A.It is easy to analyze them. B.It is possible to figure out their sources.

C.There are stamps attached to them. D.They contribute most to oceanic littering.

3.What does the underlined word “flung” in the last paragraph mean?

A.Cast away. B.Given away.

C.Carried out. D.Put out.

4.What is the best title for the text?

A.Plastic Bottles Washed up on Inaccessible Island

B.Geographical Factors Accounting for More Rubbish

C.Plastic Pollution Worsening on Remote Atlantic

D.A Bottled up Rubbish Problem on Inaccessible Island