Ответ:

1. Has been crying.

2. Has been exercising.

3. Has been studying.

4. Has been raining.

5. I haven't been feeling.

6. Have been painting.

7. Have been having.

1. How long have you been sitting here?

2. How long have you been living in this town?

3. How long have you been studying English?

4. How long have you been planning your vacation?

5. How long have you been knowing your best friend?

Объяснение: