Michael loves scuba-diving (斯库巴潜水). By 9, he was an extraordinary swimmer and a good listener in the pool.

    Michael's first dive,{#blank#}1{#/blank#}was truly unforgettable. Instead of using a boat, the plan was to go down a ladder at the boat and drop into about 15 feet of water. Everything went perfectly. His instructor Polly led him to the nearby reef. While {#blank#}2{#/blank#} (explore) the reef in 27 feet of water, Michael suddenly signaled a problem with his mask. Polly signaled back for him to clear it. He cleared it {#blank#}3{#/blank#}then later signaled the problem again. His mask was completely flooded {#blank#}4{#/blank#}water. Michael made a sign {#blank#}5{#/blank#} he wanted to go up. Polly signaled, “NO! Stay with me!”

    According to Polly, even though scuba {#blank#}6{#/blank#}(train) teaches new divers how to deal with flooded masks, many beginners panic the first time water fills their masks during an actual dive. Michael wasn't like many beginners, though. He didn't panic. He did {#blank#}7{#/blank#} (exact) what he learned to do during his years. He stayed calm,{#blank#}8{#/blank#} (think) it through, and followed Polly's {#blank#}9{#/blank#} (instruct). Polly gradually led Michael to shallower water in an area. The group swam together back to the shore for a celebration of Michael's {#blank#}10{#/blank#}(amaze) accomplishment.

    Many of us wake up {#blank#}1{#/blank#} (feel) tired in the morning. Many of us ignore the problem as the day goes on, forgetting that it might have a dangerous effect. Society even glorifies “burning the candle at both ends” as a sign of our {#blank#}2{#/blank#}(devote) to work and family.

    Believe {#blank#}3{#/blank#} or not, all this bad sleep has far-reaching consequences. We do not give ourselves enough chances to sleep. A survey of over 74,000 people found that 35% reported sleeping less than seven hours daily {#blank#}4{#/blank#} average. Furthermore, the quantity of sleep we allow ourselves {#blank#}5{#/blank#} (change) greatly over the past 15 years.

    This lack of sleep can lead to many serious {#blank#}6{#/blank#} (problem). One study found that {#blank#}7{#/blank#} (simple) limiting yourself to six hours of sleep a night for two weeks made performance on a timed attention task as poor as if you {#blank#}8{#/blank#} (stay) up all the night before.

    If you intend to try extending your sleep period, consider giving yourself a chance {#blank#}9{#/blank#}(sleep) longer for a full week. Your body clock might be programmed in a way {#blank#}10{#/blank#} keeps you from falling asleep quickly, but it might let you sleep longer.

    Fewer than one in seven people can {#blank#}1{#/blank#} ( correct) identify common washing symbols while a {#blank#}2{#/blank#} (three) of people admit they never check instruction labels (标签). Some seven in ten say they ever had machine-washed clothes that should {#blank#}3{#/blank#} (go) to the dry cleaners because they failed to look at the labels.

    The ignorance about {#blank#}4{#/blank#} clothes should be cleaned can cost families thousands of pounds, according to a sample test of householders by a school uniform supplier.

    Men are the worst offenders with more than three quarters always using the same program on a washing machine regardless of the instructions. Almost half of {#blank#}5{#/blank#} (woman) used just three programs. {#blank#}6{#/blank#} is said that the lack of understanding over symbols is destroying thousands of pounds worth of clothing {#blank#}7{#/blank#} (treat) improperly.

    While almost eight {#blank#}8{#/blank#} ten people believe it is important to check the labels on their clothes, less than half look at them when {#blank#}9{#/blank#} (buy) new clothes. Some nine out of ten said they were unaware that some clothing should never be put in the drier.

    The labels are there to show how clothes should be treated. This {#blank#}10{#/blank#} (help) information can save time and ensure clothes to last longer.

    The polar bear is found in the Arctic Circle and some big land masses as far south as Newfoundland. While they are rare north of 88°, there is evidence {#blank#}1{#/blank#} they range all the way across the Arctic, and as far south as James Bay in Canada. It is difficult to figure out a global population of polar bears as much of the range has been {#blank#}2{#/blank#} (poor) studied; however, biologists calculate that there are about 20,000-25,000 polar bears worldwide.

    Modern methods {#blank#}3{#/blank#} tracking polar bear populations have been employed only since the mid-1980s, and are expensive {#blank#}4{#/blank#} (perform) consistently over a large area. In recent years some Inuit people in Nunavut {#blank#}5{#/blank#} (report) increases in bear sightings around human settlements, leading to a {#blank#}6{#/blank#} (believe) that populations are increasing. Scientists have responded by {#blank#}7{#/blank#} (note) that hungry bears may be congregating (聚集) around human settlements, leading to the illusion (错觉) that populations are {#blank#}8{#/blank#} (high) than they actually are. Of {#blank#}9{#/blank#} nineteen recognized polar bear subpopulations, three are declining, six {#blank#}10{#/blank#} (be) stable, one is increasing, and nine lack enough data.

    Our world has seen {#blank#}1{#/blank#} increasing number of students pressuring their parents into buying luxuries (奢侈品) just to look good before their peers. Problem is {#blank#}2{#/blank#} is to blame, parents, students or society? Now, some schools have taken action.

    To avoid {#blank#}3{#/blank#} (show) off superiority among wealthy students, Woodchurch High School in northwestern England has recently made an {#blank#}4{#/blank#} (announce) to refuse quality designer coats, including Canada Goose, often worth hundreds of dollars. Such coats make poor students feel bad since these items lead to inequality. "They feel left out and inadequate," {#blank#}5{#/blank#} (say) The Independent in its last issue.

    The ban has aroused nationwide debate. Some argue that we shouldn't take away parents' right to buy anything {#blank#}6{#/blank#} (value) they like for their kids. However, most parents applaud, believing it decreases their worries on lower incomes.

    Just as Libby Purves, a UK reporter, put it, how you feel at school largely affects your whole life. Columnist Michelle Singletary wrote on The Washington Post that now comes the {#blank#}7{#/blank#} (big) chance so far to teach students {#blank#}8{#/blank#} (understand) clothing in fact measures nothing.

    Not just this. In May St. Wilfrid's Primary School banned students {#blank#}9{#/blank#} using designer pencils in case poor students would feel {#blank#}10{#/blank#} (look) down upon.