A．the teacher saves the trouble in doing that
B．learning is made comfortable in this way
C．the teacher can easily remember students’names and faces
D．brighter students can help slower ones

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．

A．Arranging the desks in straight rows and providing every minute for the students to listen to the teacher．
B．Breaking a class into small groups and letting the students find the group they prefer to stay in．
C．Putting the students in larger classes and allowing them to discuss．
D．Breaking a class into small groups and asking the students to stay in the fixed groups as the teacher arranges．