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．Some famous people have graduated from such schools.B．Many people are taking their courses.C．Attendance at such schools is free.D．Correspondence schools offer a variety of courses.
A．Some famous people have graduated from such schools.
B．Many people are taking their courses.
C．Attendance at such schools is free.
D．Correspondence schools offer a variety of courses.
单项选择题
A．Sit there and study.B．Shuffle another deck.C．Get snacks for everyone.D．Play a card game.
A．Sit there and study.
B．Shuffle another deck.
C．Get snacks for everyone.
D．Play a card game.
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