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Question
airmans back. when he jumps out of this aeroplane, the cloth opens and spreads out like a big umbrella. it is not easy for this big umbrella to be pulled through the air, so the airman comes down slowly and is not hurt.
- it is the strength of the air which enables boys to fly their kites. when a boy pulls the sting fastened to this kite, and so draws the kite through the air the air presses against the face of the kite and so holds it up. the kite is heavy and would fall to the ground if the wind didnt press against it. the same thing, enables aeroplanes to fly. some aeroplanes are bigger and heavier than motor cars. how, then, can they keep up in the air without falling? the answer is this: as the engine pulls the aeroplane through the air, the air presses on the under part of the wings and this holds up the aeroplane starts from the ground, first of all it runs along on its wheels like a motor car, going faster and faster. when it is going fast enough, the pressure of the air under its wings is able to lift off the ground and it rises like a bird.
- air is a gas. things which keep the same shape wherever you put them, like a piece of wood or a stone, are called
solids. things that can be poured and take the shape of the cup or bottle or tin you put them into, are calledliquids. if you take a cupful of water and pour it into a glass, there is still a cupful, but its shape has changed to fit the glass. air is not a solid, for it changes its shape to fit the thing which contains it. and it is not a liquid because although a quantity of air can change its shape, it can change its size as well. air spreads everywhere, getting thinner and thinner the more its spreads. that is why we say it is not solid or liquid. it is gas. perhaps next year you will learn more wonderful things about air around us.
section i reading: read the text then choose the t/f sentence. ( 0.5 + 5 = 2.5 )
- air spreads everywhere, getting thinnier and thinnier the more if spreads. ( )
- the air presses on the under part of the wings and this holds up the aeroplane stairs by the ground. ( )
- the cloth opens and spreads out link a big umbrella. ( )
- the thin pushes the air out of way so that the paper fulls as quickly as the tin does. ( )
- air is everywere and it gives life to every living thing. ( )
complete the sentence using the right grammatical rule: present, past, continuous, past perfect, present perfect. ( 0.5 + 5 = 2.5 )
1- (when/dad/our/kid/was-had/he/polio)
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2- tom/jorge/hard/is/working/boys/and
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3- the / holidays / my/ days/ in / november / was/best/of.
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Section I Reading (True/False)
- Air spreads everywhere, getting thinner and thinner the more it spreads.
From the text: "Air spreads everywhere, getting thinner and thinner the more its spreads." (note: "its" is likely a typo for "it"). So this matches.
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T
- The air presses on the under part of the wings and this holds up the aeroplane stairs by the ground.
The text says: "as the engine pulls the aeroplane through the air, the air presses on the under part of the wings and this holds up the aeroplane" (no mention of "stairs by the ground"). The original context is about lift, not stairs.