A
Years ago, I was in Manhattan to visit my brother. Stopping at a pay phone to call him, I reached into my wallet for a piece of paper with his number on it. Later, when I got to my brother’s place, he told me a woman just called him, saying she 1 （find） a wallet. But she didn’t find anything 2 could show the owner’s identification but the phone number inside. Knowing she 3（wait） at a bar near the pay phone, I hurried over and found my hero. “May I buy you a drink?” I asked. “No, thanks, ” she said, handing me my wallet.
B
We know that 4（get） some fresh air can be a mood lifter, but now a German study gives us insight into why. When researchers examined participants’ brains, they discovered that those who spent more time outside had a larger volume of gray matter in the right prefrontal cortex-the area involved in planning thoughts and actions. Of course, getting outside could do more good than a mood shift 5 earlier studies have found that less prefrontal gray matter is linked to depression. Therefore, make it a goal 6（spend） at least one hour outside every day.
C
A new study, 7 (lead) by Wellesley Centers, found that joining social media before age 11 was significantly related to more “problematic digital behaviors”, compared to those who joined the platforms when they were older. Kids who joined social media before age 11 seemed 8(easily) distracted and more unsympathetic. However, they showed greater engagement within the online community. The good news is that parents play an active role and kids showed lessened negative effects 9 parental controls. With strong effects of the Internet, we can expect that the need to understand 10technology shapes kids in their young ages will become more urgent.