№4

1. Уже есть ответ
2. Are cutting down (we use the present continious tense because we have the time marker now)
3. Cut down (we use the present simple tense because we have the word often)
4. Was ringing (we have 2 time markers: nine o'clock and last Monday; that's why we use past continious)
5. Is ringing (it's happenning at the moment of speaking)
6. Does .... ring (we have the marker always)
7. are hiding (we have the time marker now)
8. Hides (usually)
9. Hid (we list things that the children were doing)
10. Measured (last week)
11. are measuring (it's happening at the moment of speaking)
12. Measure (general truth)

№5

1. Уже есть ответ
2. C (sometimes)
3. B (sometimes)
4. A (general truth)
5. C (always)
6. A (last year)