单项选择题

A．Pick out all the glass and metal.
B．Get rid of dust.
C．Bum waste paper.
D．Screen earth and sand.
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单项选择题
A．Written by children themselves.B．Telling stories about the reader himself.C．Printed with standard things.D．Published with the help of computers.
A．Written by children themselves.
B．Telling stories about the reader himself.
C．Printed with standard things.
D．Published with the help of computers.
单项选择题
Which of the following statements is true
A．The author is angry that the earth’’s natural resources are being destroyed by human’’s enemies.
B．People are turning a deaf ear to their own destructive behaviors towards earth.
C．People should exploit more natural resources to end the current energy shortage.
D．People feel helpless in saving the earth.
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