When marine biologist Jennifer Lavers from Australia traveled to a remote string of islands in the Indian Ocean to see how much plastic waste had washed up on the beaches, here's just part of what she found： "373，000 toothbrushes and around 975，000 shoes, largely flip-flops."
  The island was a good place to measure plastic waste because almost no one lives there. That meant the plastic there wasn't local - it floated in - and no one was picking it up.
  "It's the little stuff that's perfectly bite-sized," Lavers says. "The stuff that fish and squid and birds and even turtles can eat."
  Lavers didn't just count the stuff on the surface. She dug down 4 inches into the sand. "What was really quite amazing was that the deeper we went," she says, "the more plastic we were actually finding." What happens is that the sun breaks down the plastic on the surface, and the waves strike it into tiny pieces and drive it into the sand.
  Lavers' team of researchers studied seven of the islands, by marking off transects（横断面） on beaches and counting all the plastic inside each transect."So, more than 414 million pieces of plastic are estimated to be currently sitting on the Cocos Keeling Islands, weighing a remarkable 238 tons," Lavers says.She was flabbergasted.
  It's becoming increasingly clear that no place on the planet seems immune from plastic waste. Take the Arctic, for example. "Wastes are transported via air currents in addition to ocean currents," Ecologist Chelsea Rochman at the University of Toronto explains. "And there （in the Arctic）， we see high concentrations of small microfibers and small particles, and so, absolutely, you expect different things in different places. And what you find tells you something about where it's coming from."



What does the author intend to express by mentioning the numbers？ ______

A. To show Lavers is good in calculating.
B. To show the plastic pollution is very serious.
C. To tell the beach is very broad.
D. To tell wasting of man is very serious.

How do Lavers and her team count the waste？ ______

A. By marking off transects and then count.
B. By digging into the sand.
C. By counting the plastic on the beach.
D. By weighing the plastic.

What does the underlined word in Para 3 mean？ ______

A. Curious.
B. Puzzled.
C. Shocked.
D. Merciful.

What can we know according to the last paragraph？ ______

A. Pollution varies from place to place.
B. The Arctic is relatively cleaner than other places.
C. Plastic waste is mainly transported via air and water.
D. Almost every place on earth is now polluted.