a. the brain
b. how fast we think and talk.
c. not concentrating
d. not concentrating and poor listening.
7. The main idea of this paragraph is:
a. Not concentrating is a cause of poor listening
b. The brain is incredibly efficient. Although we talk at a rate of 120 to 150 words a minute, the brain can process 400 to 800 words a minute.
c. This would seem to make listening very easy, but actually it has the opposite effect. d. Because we can take in a speaker's words and still have plenty of spare"brain time we are tempted to interrupt our listening