A、 The need to exercise the memory.
B、 How the brain differs from other body tissues.
C、 The unconscious learning of a physical activity.
D、 How nerves control body movement.

【正确答案】 A

【答案解析】解析：细节题。根据memory may be weak，because they don’t use it enough．It’s like a muscle，if you don’texercise it，it won’t stay strong可知，引用肌肉的例子是为了说明记忆力也需要不断地练习。因此，正确答案为A。

A、 Repeat it aloud.
B、 Write it down.
C、 Make a mental picture of it.
D、 Practice recalling it.

【正确答案】 C

【答案解析】解析：细节题。根据Give your full attention to the information you hope to retain．Research clearly shows theadvantages of this，and also of active learning，of consciously trying to visualize a new fact，perhaps to make amental picture…so the new fact will stick in memory可知，发言者建议学生在脑海中形成图像，这样有助于更有效地掌握新信息。因此，正确答案为C。

A、 Ask questions about the assigned reading.
B、 Give an example of active learning.
C、 Explain recent research on recalling childhood memories.
D、 Make an assignment for the next class session.

【正确答案】 B

【答案解析】解析：推断题。根据Research clearly shows the advantages of this，and also of active learning，of consciously trying to visualize a new fact…和Let me illustrate that for you here a little more concretely可知发言者将更具体地说明，B“给出一个主动学习的例子”正确。A“关于指定阅读提问问题”，C“解释最近的有关回忆儿童时期记忆的研究”和D“给下节课留作业”均不符合文意。因此，正确答案为B。