1. I have already written my composition. May I go out?
2. How many pages of this book have you read?
3. Mike has just received a letter.
4. We had already tidied all the rooms when the guests arrived.
5. I will have carried out all my duties by the end of this year.
6. What have you done for your homework?
7. The students had learned all the words by the time their teacher came.
8. Have you ever been to St. Petersburg?
9. We hadn't posted the letter before they arrived.
10. What has happened? Why is she crying?
2)нет-No
3)все металлы имеют специфический металлический блеск-all metals have a specific metallic luster; их можно подделать, вытягивать и расплавлять-they can be forged, pulled, and melted;все металлы кроме ртути являются твёрдыми веществами-all metals except mercury are solids;металлы являются хорошими проводниками электричества-metals are good conductors of electricity.
4)да-Yes
5)да-yes
6) когда инженер проектирует металлоконструктор , он должен тщательно продумать , что стальная рама и Каддафи ее часть должны безопасно нести все нагрузки, наложенные на неё -when an engineer designs a metal structure, he must carefully consider that the steel frame and the Gaddafi part of it must safely carry all the loads imposed on it
7)в стенах, полах и перегородках-In walls, floors and partitions
8)легированная сталь-alloy steel
9)в строительстве-In construction
10)да-Yes
11)да-Yes
12)да-Yes