her career thanks to her love for online video games. Though she didn't necessarily think of that as a "second skill", it ended up doing much good to her: She became the community manager of the university's online courses, developing ways to keep digital communications civil just as she'd done in the game world. This proves, Oakley writes, that we can never tell where our expertise（专长）will lead us.

　　Whether you're inspired to learn woodworking or web development, Mindshift offers many tips that make your learning more effective. For example, to absorb information, our brains need periods of extreme focus followed by periods of mind wandering, Oakley explains. So, learners had better set aside time for rest and relaxation. In addition, to understand information more deeply, Oakley recommends actively working on it by teaching ourselves aloud or creating mind maps-the web like drawings connecting different concepts and ideas, or quickly going over the day's lessons before going to sleep.

4．What should be the biggest barrier to our learning according to Barbara Oakley?

　　A. Our personal laziness. B. Our learning disability.

　　C. Our passive thoughts. D. Our low academic goals.

5. The story of one Dutch university employee is mentioned just to show _____.

　　A. learning comes in different forms B. learning benefits us unexpectedly

　　C. learning is not difficult to practice D. learning happens everywhere in life

6. What does Barbara Oakley think is the right way to learn?

　　A. Reading the concepts and ideas aloud daily.

　　B. Staying up to review our notes in a regular way.

　　C. Solving all problems without consulting others.

　　D. Walking out for a while after learning for an hour.

7. Which opinion may Barbara Oakley agree with?

　　A. Our potential is hidden all around us. B. Changing careers leads to bad results.

　　C. Learning is the only road to success. D. Mankind has equal chance in learning.

　　C

Underneath the Greenland ice sheet lies a body of water covering an area larger than West Virginia, and until just a few years ago, scientists had no idea that it