单项选择题

The children who were selected for the experiment gained more IQ points than the others because they were ______.

A．more clever
B．taught by different teachers
C．taught with new materials and methods
D．given more encouragement by their teachers
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单项选择题
Teachers gave the selected children more attention because ______.
A．they were not as clever as the other children
B．they were told to teach them in a different way
C．they expected them to learn faster
D．they did not want to challenge them
单项选择题
A．asB．forC．likeD．over
A．as
B．for
C．like
D．over
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