单项选择题

A．Synthetic fuel.
B．Solar energy.
C．Alcohol.
D．Electricity.
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单项选择题
A．Fire prevention.B．House construction.C．Toxic chemicals.D．Insects Elimination.
A．Fire prevention.
B．House construction.
C．Toxic chemicals.
D．Insects Elimination.
单项选择题
A．To get a library card.B．To get familiar with the resources there.C．To borrow some books he needs.D．To study how to use the computer to locate the books in the library.
A．To get a library card.
B．To get familiar with the resources there.
C．To borrow some books he needs.
D．To study how to use the computer to locate the books in the library.
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