This may look like an ordinary plastic straw （吸管），but it is not made of plastic. Cameron Ross started the Celise Bio-products company, to produce single-use plastic alternatives from plant materials like these. They are made of poly lactic acid（聚乳酸）known as PLA from com starches （淀粉）．
  Cameron Ross said, "We work with food service providers, mainly larger brands, to help them get quality sustainable and cost-effective solutions, made from plants to start getting rid of single-use plastics." Single-use plastics such as bottles or straws are major cause of pollution. When we throw these away, they end up in a landfill or in the water like rivers. According to researchers, it could take up to more than 500 years for them to properly break down.
  Ross says he wasn't always so environmentally conscious himself. But ever since the hiking trip in West Virginia, when he spent more time picking up trash than enjoying nature, his priorities changed. That meant making biodegradable products that can break down in only a few years.
  While many cafes and restaurants are choosing paper products to be more eco-conscious, it isn't cheap. Paper straws can cost about eight times more than plastic straws. But bio-plastic straws cost less than a penny a straw, not even double the price of plastic ones.
  Another problem with paper straws is that they get soft and wet. You don't want to be sipping （啜饮）something that alters your drink, or starts to melt while you're drinking and then you have to get another paper straw, which creates more wastes than needed. Ross hopes his Washington DC-based company will provide an eco-friendly solution for food service providers.



Which aspect is NOT the focus of the Celise Bio-products？ ______

A. Material.
B. Appearance.
C. Quality.
D. Cost

What inspired Ross to start the Bio-products company？ ______

A. High profits.
B. Requests from food service providers.
C. Lower cost.
D. His changed environmental awareness.

What can we learn about the new straws？ ______

A. They are widely used in cafes and restaurants.
B. They cost less than paper ones.
C. They may soften or even melt while carrying water.
D. They produce more waste.

What's the author's purpose of writing the passage？ ______

A. To persuade more food service providers to work with Ross.
B. To explain the development of straws.
C. To introduce a new eco-friendly straw.
D. To compare different straws.