根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Easyways to keep your brain sharp Everyone is forgetful, but as we age, we startto feel like our brains are slowing down a bit — and that can be a very annoyingthing. Read on for some techniques worth trying. ⒈ People who regularly made plans and looked forwardto upcoming events had a 50 percent reduced chance of Alzheimer's disease (早老性痴呆症), according to a recent study. Something as simple as setting a goal tohave a weekly coffee date with a friend will