单项选择题

A．It’s environmentally friendly.
B．It’s more efficient than other alternative fuels.
C．It doesn’t destroy the ozone.
D．It’s not economical to mass-produce.
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单项选择题
A．The school canteen.B．The dorm.C．The student recreation centre.D．The library.
A．The school canteen.
B．The dorm.
C．The student recreation centre.
D．The library.
单项选择题
A．Correspondence schools conduct the students by mail.B．Correspondence schools conduct the students by radio.C．Correspondence schools conduct the students through TV programs.D．Correspondence schools conduct the students by telephone.
A．Correspondence schools conduct the students by mail.
B．Correspondence schools conduct the students by radio.
C．Correspondence schools conduct the students through TV programs.
D．Correspondence schools conduct the students by telephone.
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