Part I: Read the article and then answer the questions below. A A sea turtle swims through the water and spots a white blob floating near the surface. “Yum!” it thinks. “Ajellyfish!” Chasing after its dinner, the turtle swallows the item. But the floating blob isn’t a jelly—it’s a plasticbag that could make the sea turtle sick. B This sea creature isn’t alone: Over 700 species of marine animals(sea creatures) have been reported to haveeaten or been entangled(糾纏不清) in plastic. Scientists think that the amount of plastic in the ocean mighttriple(x 3) by 2050—and that would mean seriously bad news for the ocean and the creatures that live there. Butby understanding the problem and taking action, you can help stop that from happening. C What's the problem with plastic? Not all plastic is bad. Bike helmets, car airbags, and many medical suppliesmade with plastic save lives. Plastic water bottles can bring clean drinking water to people who don’t have it, andplastic straws can help people with disabilities drink.
 D The problem is that most of us use and then throw away more plastic than we need: things like grocery bags,drink bottles, straws, food wrappers, and plastic packaging around toys. This kind of plastic that’s used only oncebefore being thrown away is called single-use plastic, and it makes up more than 40 percent of all plastic trash.
【題組】46. What is the main idea of paragraph D?
(A) People use more plastic than they need to.
(B) Single-use plastic is more than 40% of allplastic trash.
(C) Plastic that is used once and thrown away iscalled single-use plastic.
(D) Drink bottles, straws, food wrapping areexamples of single-use plastic.