题目内容：

The next time your brain refuses to recall a simple fact or name, be thankful. That could be a sign that your brain is getting rid of unnecessary information so that it can operate more efficiently, and help you make better decisions.

The researchers say there are numerous neurobiological(神经生物学的)studies conducted on how the brain stores information, a process called persistence (暂留). However, scientists also assumed that our occasional inability to recall facts was due to a are an the brain. In 2013, scientists discovered that as new neurons combine with the hippocampus(海马区)----a region of the brain that plays a significant role in learning and remembering---they overwrite old memories, making them harder to access. There is also evidence that the brain weakens or removes connections between neurons, in which memories are encoded.

 

The scientists have a theory on why the brain spends so much energy erasing memories. They say what the brain decides to forget is determined by our daily life. An example is that our brains remember phone numbers according to the need. Instead of storing this irrelevant information that our phones can store for us, our brains are freed up to store the memories that actually do matter for us. They also believe that memorizing too much detail could prevent us from making good decisions.

So the next time you are unable to recall a seemingly important fact, don’t be hard on yourself. Just throw it to your brain’s “rubbish can” to make room for information that can contribute to making you smarter! Remember, even Albert Einstein was absent-minded!

1.What can we know from the first two paragraphs?

A. Persistence is not a process to store information

B. Once information is stored in the brain, it will last forever

C. Learning and memorizing take place in the hippocampus

D. New neurons will strengthen old memories

2.The brain has to erase memories to __________.

A. recall important information

B. store more important information

C. store detail

D. remember phone numbers

3.If some unimportant information is stored, it will be _________.

A. combined with the hippocampus

B. processed and memorized permanently

C. stored and decoded immediately

D. removed and forgotten soon

4.What is the best title of the passage?

A. Scientists encourage us to forget things

B. The way our brains memorize and encode

C. Forgetting things may make you smarter

D. Why was Albert Einstein absent-minded?