单项选择题

Disposed oil and many other items can be reused to（）

A. make new materials
B. preserve wetland and animals
C. have clean air
D. have clean water
E. collect cigarette butte
F. collect despoiled oil

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单项选择题
Organic chemistry helps to produce materials that are（）

A．as good as wool.
B．as good as an insect’s body．
C．not as good as natural materials．
D．better than natural materials．
单项选择题
Several people were missing during the storm．（）

A．Right
B．Wrong
C．Not mentioned
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