A
1) Grace and Nora have been to Norway.
2) Paul Milton has been to Italy.
3) Sarah has been to Australia.
4) Rose Finch has been to Oxford.
5) James and Bill have been to Glasgow.
6) Ben and Tim have been to France.
B
1) Alan has seen a Hollywood film.
2) Ms Grey has seen a lot of monuments in London.
3) Rick and Sally have seen a new TV programm.
4) Mr and Mrs Newton have seen an unusual theatre performance.
5) Bruce has seen a lot of places of interest.
6) Jill and Wendy have seen a famous collection of paintings.
С
1) Grace and Nora've been to Norway.
2) Paul Milton's been to Italy.
3) Sarah's been to Australia.
4) Rose Finch's been to Oxford.
5) James and Bill've been to Glasgow.
6) Ben and Tim've been to France.
7) Alan's seen a Hollywood film.
8) Ms Grey's seen a lot of monuments in London.
9) Rick and Sally've seen a new TV programm.
10) Mr and Mrs Newton've seen an unusual theatre performance.
11) Bruce's seen a lot of places of interest.
12) Jill and Wendy've seen a famous collection of paintings.
1. In chemistry class studied various substances and their interactions.
2. Chemistry is divided into 2 General parts - organic and inorganic.
3. Organic chemistry studies fats, proteins, and carbohydrates.
4. Biochemistry — the science of the chemical composition of living cells and organisms, as well as the underlying chemical processes.
5. Dmitry Mendeleev Russian scientist who created the periodic table of elements.
6. the properties of chemical elements depend on the atomic number.
7. A chemical reaction is the interaction of two or more substances.
8. It depends on the physical state of body: solid body, liquid and gas.
