Методические рекомендации для подготовки к экзамену по английскому языку (для студентов химического факультета). Жилина Л.В. - 14 стр.

                    TEST 3. SEQUENCE OF TENSES                                                                TEST 4. CONTROL TEST

I. Use the verbs in brackets in appropriate tenses observing the rules of the         I. Translate this text.
sequence of tenses.                                                                          Aprotic solvents include the inert materials which have no affinity for
       1. They promised that they (to bring) us to all the necessary books.           the proton and/or which are incapable of dissociating the proton. It is per-
2. He did it better than I (to expect) he would. 3. He said that the tractors (to     haps incorrect to assume that there is any such thing as an inert solvent. On
be) there soon. 4. I think it all happened soon after the meeting (to end). 5. He     the other hand, in relation to those other materials which have been desig-
said that he (can) not do it without my help. 6. The astronomer told us that the      nated above as basic, acidic, or amphiprotic solvents, it must be recognized
Moon (to be) 240,000 miles from the Earth. 7. We asked the delegates whether          that hydrocarbons and the halogenated hydrocarbons are aprotic in nature
the ever (to see) such a demonstration. 8. It was decided that we (to start) our      and will not affect strongly the properties of either a base or an acid which
work at four o’clock. 9. I told you that I (to leave) town on the following day.      may be dissolved in them.
10. I did not know that you already (to receive) the letter. 11. The boy did not             Classification of solvents on the basis of their protophylis nature is es-
know that water (to boil) at 100 ºС. 12. He wanted to know what (to become)           pecially useful in connection with the Bronsted-Lowry concept which de-
of the books. 13. I was told that the secretary just (to go out) and (to come         fines the behavior of hydrogen-containing compounds as acids. Whether or
back) in half an hour. 14. We were afraid that she not (to be able) to finish her     not a substance will behave as an acid or as a base depends upon the charac-
work in time and therefore (to offer) to help her. 15. He said we (may) keep          ter of the solvents. Urea is very weakly basic in aqueous solution, but be-
the book as long as we (to like). 16. When I called at his house, they (to tell)      haves as a weak acid in liquid ammonia. Many substances which are weak
me that he (to leave) an hour before. 17. It (to be) soon clear to the teacher that   bases in aqueous solution exhibit an enhanced basic character when dis-
the new pupil (to cause) much trouble. 18. I was thinking what a pleasure it (to      solved in an acidic solvent. From a practical point of view this is quite im-
be) to see my old friend again; I not (to see) him since my schooldays. 19. I         portant since salts of weak acids can be prepared most readily in basic sol-
have not yet told them that I (to get) them those books in the nearest future.        vents, whereas salts of weak bases can be synthesized most readily in acidic
                                                                                      solvents.
II. Translate into English observing the rules of the sequence of tenses.
       1. Я её спросила, почему она так расстроена (upset). 2. Они сказали
                                                                                      II. Grammar. Translate into Russian.
нам, что немного выше по реке есть место, где легко перебраться на дру-
                                                                                             1. The precipitated AgCl curds readily when shaken.
гой берег. 3. Он обещал, что принесет нам английские книги для домаш-
                                                                                             2. A standard solution of an acid and a standard solution of a base,
него чтения. 4. Я ему сказала, когда я пришла и сколько сделала за это
                                                                                      when prepared for use together, should have approximately equal normal-
время. 5. Он сказал, что он скоро вернется обратно и тогда мы напишем
                                                                                      ities.
вместе программу. 6. Вы знали, что я больна, почему же вы меня не на-
                                                                                             3. The solvent power of the amines for ionic compounds is definitely
вестили? 7. Я вам сказала по телефону, что я её ещё не видела и что я
                                                                                      inferior to that of the parent substance, liquid ammonia.
надеюсь увидеть её в четверг. 8. Он заявил, что он никогда не брал этой
                                                                                             4. None of these substances have been shown to be definite com-
книги из библиотеки и что у него самого есть такая книга. 9. Я не знала,
                                                                                      pounds, and it is at least possible that the solids merely contain adsorbed
что вы так долго были больны. Мне только вчера сказали, что вы про-
                                                                                      helium on the dispersed metal; indeed, Damianovich says that his platinum
пустили десять занятий. 10. Было решено, что мы пойдем в лес за гриба-
                                                                                      product gave X-ray diagrams resembling those given by colloidal platinum.
ми и не вернемся домой до вечера. 11. Она сказала мне, что у неё не было
                                                                                             5. The chemistry of the alkali metals, as ordinary by understood, is
времени прочесть эту статью и что она собирается сделать это в бли-
                                                                                      almost entirely that of the ions Li+, Na+, K+, Rb+ and Cs+; it is concerned
жайшем будущем. 12. Я не знала, что у вас есть маленькая дочка. 13. Он
                                                                                      with the behavior and the reactions of the salts, which are practically all
выразил сожаление, что заставил меня ждать так долго, но добавил, что
                                                                                      strong electrolytes- that is, they are ionized under all conditions.
это была не его вина, так как его задержали на работе.
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