Некоторое устройство передает в секунду один из семи сигналов. Сколько различных сообщений длиной в 3 с можно передать при помощи этого устройства?

Определите по грамматическим признакам, какой частью речи являются слова, оформленные окончанием -s и какую функцию это окончание выполняет, т.е. служит ли оно:

Переведите предложения на русский язык.

 All the engineers and economists of the office speak English well.

Machinoexport does business with different countries of the world.

Foreign trade is an important part of Russia’s economy.

ПОМОГИТЕ ПОЖАЛУЙСТА, срочно.. ! 

Complete the sentences using personal, possessive and reflexive pronouns.

1. There can be no doubt that Shakespeare ... wrote this play.
2. We were in the park on ... own.
3. My roommate and I have to share a bookshelf. She keeps ... books on the top two shelves, and I keep ... on the bottom two shelves.
4. Just between you and ... , I think Tom is going to lose ... job.
5. Our house is almost the same as our neighbours' house. The only difference is that ... is grey and is white.
6. Jason has only ... to blame for the mistake he made.
7. Your cassette player sounds better than ... .
8. My washing machine can switch ... off.
9. The children arranged the party by ... .
10. Mrs. Collins is better now. I saw ... down town yesterday.
11. Romeo and Juliet killed ... .
12. Promising that she would call later in the day, Linda excused ... and hurried off.
13. The cildren were vaccinated to protecr ... against the disease.
14. The neighbours hardly know him becouse he keeps himself to ... .
15. Did you cool the pizza ... or did you buy it ready-made?
16. The President ... opened the exhibition.