单项选择题

The reason some children are backward in speaking is most probably that ______.

A．they are incapable of learning language rapidly
B．they arc exposed to too much language at once
C．their mothers respond inadequately to their attempts to speak
D．their mothers are not intelligent enough to help them
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单项选择题
Which of the following is NOT true according to the passage
A．New kind of desks and chairs should be made.
B．Many companies are trying to improve the working settings for their employees.
C．Classroom interaction between students is essential to the training of critical thinking.
D．A comfortable environment leads to higher working efficiency.
单项选择题
The underlined expression step back in time at least a hundred years ( Para. 2 ) is intended to convey the idea that ______.
A．college classrooms often remind people of their cortege life
B．critical thinking was encouraged even a century ago
C．a hundred years ago, desk arrangement in a classroom was quite different
D．there is not much change in the college educational idea over the past hundred years
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