单项选择题

A．There was crystal in all glass.
B．Lead crystal makes good glass.
C．Crystal is as hard as skyscraper.
D．In ordinary glass, the atoms are ordered.
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单项选择题
A．Because he was a famous English writer.B．Because he enjoyed walking along the street.C．Because he had a good memory.D．Because he was proud of his own ability.
A．Because he was a famous English writer.
B．Because he enjoyed walking along the street.
C．Because he had a good memory.
D．Because he was proud of his own ability.
单项选择题
A．It’ s a convenient source of entertainment.B．It’ s an inexpensive source of entertainment.C．It’ s an unlimited source of entertainment.D．It’ s a costly source of entertainment.
A．It’ s a convenient source of entertainment.
B．It’ s an inexpensive source of entertainment.
C．It’ s an unlimited source of entertainment.
D．It’ s a costly source of entertainment.
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