Multitasking is easiest when at least one of the tasks is habitual, or requires little thought. Most people don’t find it difficult to eat and read the newspaper at the same time. However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.

　　We often don’t remember things as well when we’re trying to manage several details at the same time. Without mental focus, we may not pay enough attention to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget people’s names—even sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their e-mail while on the phone with a friend, they may come off as absent-minded or disinterested. It can also cause that person to miss or overlook key information being passed on to them.

　　1. Why are some mental aerobic exercises designed to engage people in multitasking?

　　A. To make them more productive.

　　B. To reduce their stress and anxiety.

　　C. To develop their communication skills.

　　D. To help them perform daily tasks more easily.

　　2. According to Paragraph 2, why may a person suddenly forget who he has called?

　　A. He may have his prefrontal cortex temporarily damaged.

　　B. He is probably interrupted by another task.

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