Объяснение:
1. We have known each other for four years.
2. I always wanted to learn English.
3.Where is Nina?
- She's been home for two hours.
4.Where are the children?
-They are still playing in the yard.
5. My brother has been an engineer for three years.
6. My friend knows English from childhood.
7. I've been watching you for half an hour.
8. Is your brother still sick?
"No, he’s already got better. He’s been studying physics for three days. He wants to get an excellent grade in the exam."
10. I've been trying to find my old notebook for twenty minutes
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!
A. in the post office надеюсь правильно