1. Mirror neurons can explain　.　

　　A. why we cry when we are hurt

　　B. why we cough when we suffer from a cold

　　C. why we smile when we see someone else smile

　　D. why we yawn when we see someone else stay up late

　　2. The underlined word“triggered”in the third paragraph probably means“　”.　

　　A. set off B. cut off　C. built up D. broken up

　　3. We can learn from the passage that mirror neurons　.　

　　A. relate to human behavior and interaction

　　B. control human physical actions and feelings

　　C. result in bad behavior and social disorders

　　D. determine our knowledge and language abilities

　　4. What is the passage mainly about?

　　A. Ways to find mirror neurons.　 B. Problems of mirror neurons.

　　C. Existence of mirror neurons.　 D. Functions of mirror neurons.

　　【参考答案】1—4、CAAD

　　阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。

　　Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule, protecting them from the body—and the body from them—until they can be released at just the right spot. There are lots of ways to trigger (引发) this release，including changing temperature, acidity, and so on. But triggers can come with their own risks—burns, for example. Now, researchers in California have designed what could be a harmless trigger to date: shining near­infrared light (NIR, 近红外线) on the drug in the capsule.

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