Складність:
1. Present perfect. Questions 6Б.
2. Present perfect. Negative sentences 4Б.
3. Present perfect. Affirmative sentences 5Б.
4. Present perfect continuous. 'Have' or 'has' 3Б.
5. Present perfect continuous. 'For' or 'since' 3Б.
6. Present perfect continuous. Questions 3Б.
7. Present perfect or present perfect continuous 5Б.