Ex. 8. Fill in the blanks with prepositions where ncccssary.
by, of, to, in, after, without, between
1. D. I. Mendeleyev made ... a thorough study ... the relation ... the
atomic weights... the elements and their properties. 2. Mendeleyev’s periodic
table consisted ... seventeen columns. 3 a general way Mendeleyev’s
table resembled ... the present periodic table ... the noble gases.
4. Mendeleyev placcd... a number... elements... different positions. 5. The
periodic law was accepted ... its proposal... Mendeleyev. 6. M ost... the
elements occur ... the periodic table ... the order ... increasing atomic
weights. 7. Mendeleyev predicted the existence ... six elements
corresponding... vacant places... his table. 8. The properties... the newly
discovered elements were very close ... the properties predicted ... him.
Hello dear friend!
I want to tell you about my space travel. As you know, quite recently our scientists have implemented space flights. It was unforgettable! Constellations, comets and other celestial bodies are so magnificent that they cannot be conveyed in earthly words! But we were in danger, a meteor shower overtook us. The experience of the pilot saved us, otherwise we would not have landed. You know, I made a conclusion for myself from this "cosmic" story: you always need to risk something in order to achieve more than you have!
Moscow
Rusiia
07 June 2007
Dear Jenny,
Thanks for your letter! It was great to hear from you again! Sorry, I have not answered earlier because I was busy with my exams.
In your letter you asked me about subjects of school. Well, mathematics is the most difficult subject for me at school.My school has several laboratories and a lot of special equipment for the study of science. As for me, I read a lot of useful information in books to prepare for tests.
Sorry, I have to go help my mom now. Keep in touch!
Best wishes,
Ann