Упражнение 2. for или since?

Решение:

Вставляем 'for' (для обозначения периода времени) или 'since' (для обозначения момента начала).

1. I've been learning English since I was ten years old.
2. They have been building this house for two years.
3. She has been working at the hospital since last spring.
4. We've been waiting in the queue for forty minutes.
5. He hasn't been eating well since he got sick.
6. My parents have been living in Tashkent for more than 20 years.
7. The baby has been crying for half an hour. I'm so tired!
8. I haven't been feeling well since last weekend.

Ответ: since; for; since; for; since; for; for; since.