Well, today is the day. Microsoft is officially pulling the life support plug on Windows XP. And while the majority of PC user have {#blank#}1{#/blank#} (obvious) moved on to newer operating systems(OS）, some people stuck {#blank#}2{#/blank#} Windows XP over the last 12 years. As is reported by The Washington Post, {#blank#}3{#/blank#} enormous number of government machines are still running the old OS, {#blank#}4{#/blank#} could probably create a security problem.

    Clearly, over 13 percent of PCs in the United States are still running Windows Xp, {#blank#}5{#/blank#} Microsoft announced the end for support over two years ago. As many as 10 percent of US government computers, thousands of PCs holding sensitive information{#blank#}6{#/blank#} (include), will now be without{#blank#}7{#/blank#} (far) security updates.

    Yesterday, the Guardian reported the UK government has paid Microsoft 5.5 million pounds for a one-year {#blank#}8{#/blank#} (extend) of support. And if you think the problem is only at the desktop and notebook level, you can be quite wrong; don't forget as many as 60 percent of ATM machines in the US{#blank#}9{#/blank#} (be) still running XP.

    So, what's the solution? These business, government agencies and consumers will have to upgrade. And whether they choose Windows 7{#blank#}10{#/blank#} Windows 8, either is probably better than a security breach(漏洞）.

    It is difficult for parents of nearly every family to teach their children {#blank#}1{#/blank#} (be) responsible for housework, but with one of the following {#blank#}2{#/blank#} (suggestion), you really can get your children to help at home.

    If you give your children the impression that they can never do {#blank#}3{#/blank#} quite right, then they will regard themselves as unfit or unable person. {#blank#}4{#/blank#} children believe they can succeed, they will never become totally independent.

    My daughter Carla's fifth grade's teacher {#blank#}5{#/blank#} (make) every child in her class feel special. When students received less than a perfect test score, she would point out {#blank#}6{#/blank#} they had mastered and declared firmly they could learn what they {#blank#}7{#/blank#} (miss).

    You can use the same technique when you evaluate your child's work at home. Don't always scold and you should give lots of praise {#blank#}8{#/blank#} (48). Talk about what he has done right, not about what he hasn't done. If your child completes a difficult task, promise him a Sunday trip or a ball game. {#blank#}9{#/blank#} (learn) is a process of trying and failing and trying, and succeeding. If you teach your children not to fear a mistake or failure, they will learn {#blank#}10{#/blank#} (fast) and achieve success at last.

    No one knows exactly {#blank#}1{#/blank#}the earth began. According to a widely accepted theory, the earth began with a “Big Bang”,{#blank#}2{#/blank#}exploded loudly and produced water vapor and many gases，{#blank#}3{#/blank#} (make) the earth's atmosphere. As the earth cooled down, water appeared and stayed{#blank#}4{#/blank#} the surface. It was the presence of water{#blank#}5{#/blank#}allowed the earth to dissolve harmful gases and acids into the oceans and seas, which made {#blank#}6{#/blank#}possible for life to develop. First, the appearance of small plants encouraged the development of early shellfish and all sorts of fish. Next, green plants began to grow on land. {#blank#}7{#/blank#}were followed by land animals. So reptiles appeared for the first time. Later, dinosaurs developed.{#blank#}8{#/blank#}they suddenly disappeared. After that, mammals came into being. Finally, humans appeared and spread all over the earth. However, they are putting too much carbon dioxide into the atmosphere, making the earth too hot{#blank#}9{#/blank#}(live) on. So whether life will continue on the earth will depend on {#blank#}10{#/blank#}this problem can be solved.

    Young sunflowers face the sun as it rises in the east and follow it across the sky until it sets in the west. Why does this happen? A team of scientists has finally been able to figure{#blank#}1{#/blank#} how and why young sunflowers move.

    Older sunflowers always face east. However, as it{#blank#}2{#/blank#}(turn) out, an internal（内部的）clock helps young sunflowers track the sun so that they can grow better. US biologist Stacey Harmer and her colleagues had it{#blank#}3{#/blank#}(explain) in a recent paper published in the journal Science on Aug. 5.

    {#blank#}4{#/blank#}(depend) on the time of day, certain growth genes seem to work to different degrees on different{#blank#}5{#/blank#}(side) of young sunflowers' stems（茎）. The east side of their stems grows faster during{#blank#}6{#/blank#}day, causing the stems to {#blank#}7{#/blank#}(gradual) bend from east to west. The west side grows faster at night, preparing them for the next morning.

    All this move is highly{#blank#}8{#/blank#}(benefit) to sunflowers. The team found that flowers kept away from the sun had leaves{#blank#}9{#/blank#}were 10 percent smaller on average. According to Harmer, sunflowers which{#blank#}10{#/blank#} (face) with the sun receive more bees and other insects because they like warm flowers.