Excused from recycling because you live in a high rise with a rubbish chute（垃圾道）？ You won't be for long. Miami's Mark Shantzis has made it simple for those living in tall buildings to use the chute and recycle too.
In Shantzis' Hi-Rise Recycling System,a chute leads to a pie-shaped container with six boxes that can turn around when operated. The system,which fits in the same space as the chute and container now in use, enables glass, plastic, paper, metal, and other rubbish to go into separate boxes.
The system is controlled from a board next to the chute door. The board has a button for each class of recycling materials（as well as for unrecyclables）. At the press of a button, a microcomputer locks all other floors' chute door and sets the recycling container turning until the right box comes under the chute. The computer also counts the loads and gives a signal by phone when the box is full. And a particular piece of equipment breaks up the nonrecyclables.
Sorting recyclables before they are collected saves the use of expensive materials recovery equipment which otherwise has to do the sorting. Such equipment often makes recycled materials very expensive, so expensive that tons of recyclables remain wasted. Shantzis believes his system could help recycled materials become more cost-effective.



What does the underlined sentence in Paragraph 1 mean？ ______

A. Soon you'll have to recycle your rubbish.
B. You'll soon be living in a cleaner building.
C. Rubbish chutes will become out of date before long.
D. It won't take long to recycle rubbish in future.

What do you need to do before dropping rubbish into the chute？ ______

A. Lock the other floors' chute doors.
B. Check whether the container is full.
C. Break up the nonrecyclables.
D. Press the correct button.

What is one of the benefits of Shantzis' system？ ______

A. It saves the cost of time and space.
B. It cuts the expense of recycling.
C. It saves money for people living in high rises.
D. It makes better use of the existing recovery equipment.

The purpose in writing this text is ______ .

A. to encourage people to recycle their rubbish
B. to describe the use of computer technology in recycling
C. to introduce a recycling system for tall buildings
D. to explain the need for rubbish collection in high rises