Question

2.Раскройте скобки, употребляя глагол в Present Perfect.
1. I (not, to meet) her since we left school. 2. You ever (to see) mountains? 3. They (to know) her for two years. 4. Don’t worry about the letter. I already (to post) it. 5. “Do you speak German?” – “No, I never (to study) it.” 6. I never (to eat) caviar.

Answer 1

1. have not met.
2. have you ever seen mountains?. 
3. have known.
4. have posted. 
5. have never studied.
6. have never eaten. 

Answer 2

I have not met her since we left school
Have you ever seen mountains
They have know her
I have already posted
I've never studied
I've never eaten