单项选择题


Questions 19 to 22 are based on the passage you have just heard.

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．When we are tired.B．When we have a balanced diet.C．When we can relax.D．When we do regular exercise.
A．When we are tired.
B．When we have a balanced diet.
C．When we can relax.
D．When we do regular exercise.
单项选择题
A．Teach the students the right way of thinking,B．Point out the students’ mistakes and correct them.C．Give the students correct answers and let them work on their own.D．Do some routine work.
A．Teach the students the right way of thinking,
B．Point out the students’ mistakes and correct them.
C．Give the students correct answers and let them work on their own.
D．Do some routine work.
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