主要内容题（what’s the passage mainly about?）
写作目的题（what’s the author’s writing purpose?）
最佳标题题（which of the followings is the best title?）
Most episodes of absent-mindedness—forgetting where you left something or wondering why you just entered a room—are caused by a simple lack of attention, says Schacter. “You’re supposed to remember something, but you haven’t encoded it deeply.”
Encoding, Schacter explains, is a special way of paying attention to an event that has a major impact on recalling it later. Failure to encode properly can create annoying situations. If you put your mobile phone in a pocket, for example, and don’t pay attention to what you did because you’re involved in a conversation, you’ll probably forget that the phone is in the jacket now hanging in you wardrobe (衣柜). “Your memory itself isn’t failing you,” says Schacter. “Rather, you didn’t give your memory system the information it needed.”
Lack of interest can also lead to absent-mindedness. “A man who can recite sports statistics from 30 years ago,” says Zelinski, “may not remember to drop a letter in the mailbox.” Women have slightly better memories than men, possibly because they pay more attention to their environment, and memory relies on just that.
Visual cues can help prevent absent-mindedness, says Schacter. “But be sure the cue is clear and available,” he cautions. If you want to remember to take a medication (药物) with lunch, put the pill bottle on the kitchen table—don’t leave it in the medicine chest and write yourself a note that you keep in a pocket.
Another common episode of absent-mindedness: walking into a room and wondering why you’re there. Most likely, you were thinking about something else. “Everyone does this from time to time,” says Zelinski. The best thing to do is to return to where you were before entering the room, and you’ll likely remember.
30. What is the passage mainly about?
A) The process of gradual memory loss.
B) The causes of absent-mindedness.
C) The impact of the environment on memory.
D) A way if encoding and recalling.（B）
以这篇文章为例，段句就了文章主题词。这个例子，而是中心内容。恶狠狠的读下主题句的主干，Most episodes of absent-mindedness are caused by a simple lack of attention. 对应选项B，The causes of absent-mindedness.
比如段，Lack of interest can also lead to absent-mindedness.段，Visual cues can help prevent absent-mindedness, 这两段又了两个absent-mindedness的成因。答案B，The causes of absent-mindedness.