read the text again and fill in the gaps with a suitable word from the boxes in each part properties elements opaque chemical periodic rust conducts...
read the text again and fill in the gaps with a suitable word from the boxes in each part
properties elements opaque chemical periodic rust conducts materials
this (1) element is a good conductor of both electricity and heat. in chemistry, this (ancient greek métallon, μέταλλον) is an element or alloy that (2) electricity. in this element, atoms readily lose electrons to form positive ions. those ions are surrounded by delocalized electrons, which are responsible for the conductivity.
metals occupy most of the periodic table, while non-metallic (3) can only be found on the right-hand-side of the (4) table of the elements. a diagonal line drawn from boron (b) to polonium (po) separates the metals from the non-metals. most elements on this line are metalloids, sometimes called semiconductors. this is due to the fact that these elements have electrical (5) common to both conductors and insulators (elements that don’t carry electricity). elements to the lower left of this division line are called metals, while elements to the upper right of the division line are called ( .
metals are very corrosive – they (7) in contact with water. painting (or any other form of covering) is a good way to prevent their corrosion.
metals in general have high electrical conductivity, the ability to be deformed under stress. optically speaking, metals are (8) (that means ‘not clear’), shiny and lustrous. the large number of free electrons in any typical metallic element or alloy is responsible for the fact that they can never be categorized as transparent (9)
Tom and Mary live in England. They both work in London, but they don't live there. Mary works in a hotel and Tom drives a taxi. They both enjoy their jobs, because they meet a lot of people. They live in a very nice house, but they want to move. We like our jobs, Mary says but we have to travel to London every day. It takes a long time and it costs a lot of money. Mary wants to buy a house in London, but houses there cost a lot, too.
Here we practise The Present Simple Tense.
1. Robert is younger than Sue.
2. My cousin is taller than my brother.
3. A kitten is smaller than a cat.
4. My father is two years older than my uncle.
5. Dogs are better than cats.
2)will be painted
3)is looked for
forest 13)you saw a lot of interesting 14)you didn't write a 15)you invited nobody to visit
i hours. (play/since/
местоимений: 1.i often see (they, them) in the bus. 2.(we, us) always walk to school together. 3.i always speak to (he, him) in english. _3) употребите нужную форму притяжательных местоимений: 1.i'm afraid they will take (you, your) words against (her, hers). 2. all (our, ours) clothes were dirty, and (my, mine) especially so. _ 4)заполните
пропуски указательным местоимениями this, that, these, those: 1. very interesting. exercises are very easy. my english book.
1 Merlin created/made a contest to see who
could pull the sword from the stone.
2 People believed he had magical/huge powers.
3 There are a lot of special/fascinating figures in
4 Fashion fads/hits don't last very long.
5 Avatar is a computer-generated/fiction film.
Here you a