单项选择题

The biggest advantage of this new system is that ______.

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

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热门试题

单项选择题

The purpose in writing this text is ______.

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

单项选择题

Before dropping rubbish into the chute you have to ______.

A．lock the other floors' chute doors
B．check ff the container is full
C．press the correct button
D．break up the rubbish