单项选择题

A．They lived in large groups.
B．They used sand as insulation.
C．They kept fires burning constantly.
D．They faced their homes toward the south.
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单项选择题
A．He lost the final chance to win a championship.B．He was knocked out during one contest.C．He broke a bone in the wrist during a match.D．He was awarded with a $1.5 million house.
A．He lost the final chance to win a championship.
B．He was knocked out during one contest.
C．He broke a bone in the wrist during a match.
D．He was awarded with a $1.5 million house.
单项选择题
A．He has more than one child.B．His wife is a graduate student.C．He is a full-time student.D．He works at the university housing office.
A．He has more than one child.
B．His wife is a graduate student.
C．He is a full-time student.
D．He works at the university housing office.
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