单项选择题

A．Because they are much darker than their parent stars.
B．Because there are too many of them.
C．Because there is too much light in the universe.
D．Because they are next to a huge explosion.
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单项选择题
A．With an English family,B．In a flat near the cortege.C．In the classroom.D．In a student dormitory.
A．With an English family,
B．In a flat near the cortege.
C．In the classroom.
D．In a student dormitory.
单项选择题
A．At 10:00 p.m.B．Midnight.C．At5:0Op. m.D．At9:30.
A．At 10:00 p.m.
B．Midnight.
C．At5:0Op. m.
D．At9:30.
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