Imagine life as a game in which you are playing some five balls in the air. You name{#blank#}1{#/blank#} (they)—work, family, health, friends and spirit, and you're keeping all these balls in the air.

       You understand that work is a rubber ball. If you drop it, it will bounce back. But the other four balls are made of glass. If you drop one of them, it will be scuffed（磨损）, damaged or even broken into {#blank#}2{#/blank#} (piece). They will never be the same. You must understand the balance in your life. How?

        Don't compare yourself with others. It is because we are different and each of us{#blank#}3{#/blank#}(be) special. Don't set your goals by what other people consider important. Only you know {#blank#}4{#/blank#}is best for you. Don't give {#blank#}5{#/blank#} when you still have something to give. Nothing is really over until the moment you stop {#blank#}6{#/blank#} (try). Knowledge is weightless,{#blank#}7{#/blank#} treasure you can always carry{#blank#}8{#/blank#}(easy). Don't run through life so fast that you forget not only where you've been, where you are, but also where you{#blank#}9{#/blank#}(go).

        Life is not a race, but a journey to {#blank#}10{#/blank#} (enjoy) slowly each step of the way. Yesterday is history, tomorrow is a mystery, and today is a gift. That's why we call it—the present.

    Astronauts are people who go out into space. Being an astronaut is an exciting job. While in space, astronauts can look down and see {#blank#}1{#/blank#}（cloud）, land, and water. They can even see the moon up close. Astronauts get the chance {#blank#}2{#/blank#}(see) more stars than you or I have ever seen. Being an astronaut may be exciting, {#blank#}3{#/blank#} it is not an easy job. A person who {#blank#}4{#/blank#}(want) to be an astronaut has to study for years. There are many things an astronaut must learn to do before going into space.

    Access to electricity has always been limited for people living in Nuevo Saposoa, {#blank#}1{#/blank#}remote village in Peru. However, things went from bad to {#blank#}2{#/blank#}(bad)in March 2015 after a flood damaged the power station in the area. The villagers {#blank#}3{#/blank#}(force)to turn to kerosene(煤油)lamps, which are not only expensive but give off poisonous matter.

    Fortunately, the researchers and students at the UTEC in Lima, Peru heard about it and came up with a {#blank#}4{#/blank#}(create)idea. They designed a lamp that can be powered by plants and soil, both of {#blank#}5{#/blank#}can be found in the Amazonian rainforests where the village {#blank#}6{#/blank#}(lie). Called Plantalamparas, the lights draws energy from a plant {#blank#}7{#/blank#}(grow)in the rainforests and uses it to light up an LED bulb. So far, the bulbs have been a huge success.

    This is not the first time the students and professors of UTEC {#blank#}8{#/blank#}(come)up with a clever approach {#blank#}9{#/blank#}a problem. In 2014, {#blank#}10{#/blank#}(deal)with Peru's severe air pollution they created a large advertising board that could be used as an air purifier(净化器)as well.

    Schools in the UK are trying the use of classroom robots in {#blank#}1{#/blank#} attempt to ease the growing teacher shortage. So far, two primary schools in Plymouth {#blank#}2{#/blank#} (start)to use the machines as possible replacements for teaching assistants. Britain's lack of teaching staff has been worsening over the last decade and shows no sign of improving. {#blank#}3{#/blank#} (graduate) are unwilling to enter the primary   education department and many teachers are giving up the teaching jobs for careers in other fields. {#blank#}4{#/blank#} (face) with this alarming shortage, some schools believe that robots might soon be able to fill the gap. Tests have shown that teachers can train the robots within just three hours by showing {#blank#}5{#/blank#} (vary) classroom techniques. These methods are then copied by the robots and used in a real classroom setting {#blank#}6{#/blank#} real students are doing tasks. In one example, the robot teacher {#blank#}7{#/blank#} (success) guided the   students through {#blank#}8{#/blank#} (challenge) tasks, giving them praise and encouragement when necessary. The project has been met with mixed reactions from teachers. Some are concerned that the robots are here to take their jobs, {#blank#}9{#/blank#} others optimistically regard the machines {#blank#}10{#/blank#} a way to reduce their heavy workloads.