单项选择题

The energy is saved because ______.

A．the factory only needs ten people to produce glasses
B．in the new way, broken bottles can be used, too
C．the inventors received worldwide patent rights to own the process they developed
D．the glass is heated to strengthen it

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单项选择题

What is the main idea of the passage

A．An Energy-saving way to recycle bottles into drinking glasses.
B．How to make drinking glasses.
C．Recycling gives used bottles a new life.
D．Green Glass received worldwide patent rights.

单项选择题

How long does it take to make out a glass according to Green Glass Company

A．Eight months.
B．Ten days.
C．Three hours.
D．Seven minutes.