Verified answer

A

2. I have been looking for you everywhere.

3. Mike hasn't been feeling well.

4. We have been giving her advice.

5. Who has been eating my chocolate?

6. My dad has been helping me.

7. The phones haven't been working.

8. Have you been doing that crossword?

B

1. has been

2. been listening

3. hasn't come

4. has been singing

5. taken

6. has been reading

7. has finished

8. have been thinking

9. hasn't understood

10. has drunk

C

For: a long time, my whole life, the rest of the year, two months;

Since: February, it happened, I got home, midnight, she was two years old, Christmas