Researchers at a Canadian Institute suggest how the interaction(交互) between remembering and forgetting in the brain     1    (allow) us to make more intelligent decisions based on memory. They published the review paper in the journal Neuron.

Forgetting makes us much smarter by working with memorizing     2    the following ways, the researchers say. First, letting go of outdated information lets us adapt to new situations. By     3    (forget) the older and potentially misleading information, we can adapt to new environments more     4    (easy). Second, forgetting also makes decision-making easier. We remember the important information which makes it easier for us     5    (make) wise decisions.

What and how much we remember can     6    (decide) by our environments. For example, a lawyer or a designer with a set of clients will likely remember     7    (they) names for a longer period of time. A cashier who has a changing sea of     8    (customer) every day will only remember names for a short amount of time.

The researchers point out that the motto is true: If you don’t use it, you lose it. But as this review paper shows, it can be     9       good thing. Clearing out the information you don’t need can help make room for the important stuff,     10     can make you become more intelligent.

A study,     1     (lead) by the University of St. Andrews, found a balanced and healthy lifestyle, including becoming fitter, having less stress and sleeping     2     (long) all gave skin a more healthy-looking colour.

Previous     3     (study) have linked improvements in skin colour to a good diet but the latest study also examined     4     relationship between general health and skin colour.

They measured skin colour with a device that recorded how a rainbow of colours was reflected from the skin and found that both high     5    (fit) and low body fat were associated with a higher skin yellowness.

The research team also assessed whether a change in health changed skin appearance. They     6     (follow) 59 students from sports clubs to measure the training effect     7     their skin.

They found those     8     became healthier or lost body fat showed an increase in skin yellowness. Scientists concluded that exercise and healthy eating were low-cost ways of improving your skin. Any effort     9     (improve) lifestyle would benefit the skin within a     10     (relative) short time.

Having trouble thinking creatively? Not able to focus on tasks that need to get done? Poor sleep could potentially be     1     (blame). It turns out lack of sleep can do a number on your brain—and not just in the short term.

Research suggests not getting enough quality sleep can have serious permanent negative     2     (consequent). On the other hand, good sleep habits can have lasting benefits. Below are three research-backed brain benefits of sleep.

Stimulates creativity Thinking in new, imaginative ways requires     3     well-rested brain. On the contrary, a brain     4     (suffer) from a lack of sleep is unable to think creatively.

A study reported in the journal Nature bears this out. For the study, participants learned a task     5     they had to recognize a hidden pattern in the questions they were asked. Their initial training     6     (follow) by eight hours of nighttime sleep or wakefulness or daytime wakefulness.

More than twice as many participants gained insight into the hidden rule after sleep as those who did after wakefulness, regardless of the time of day. The researchers concluded that “sleep, by restructuring new memory representations,     7     (facilitate) obtaining of expressive knowledge and     8     (insight)behavior. ”

Reduces depression Often influenced by chemical imbalances in the brain, depression and sleep problems go hand-in-hand. People with depression may either have a hard time sleeping or else get too much sleep.

While it’s not clear if lack of sleep causes depression, it can worsen it. Studies show people who sleep fewer than six or more than nine hours a night are more likely to be depressed than those     9     between.

Solidifies memories One of sleep’s main functions is to help improve memory. It does this by enabling the brain to strengthen some neural pathways (神经通路)     10     reducing those it doesn’t need. For example, your brain does not need to keep every sensory impression collected during your waking hours.