Some в положительных предложениях.
any в вопросе и отрицании
During sleep, a person periodically alternating two main phases: slow and fast sleep, and in the beginning of the sleep duration prevails slow phase, and before awakening - increasing the duration of REM sleep. Polysomnography showed that sleep most people consists of 4-6 wavelike cycles, lasting 80-100 minutes.
1. -
2. -s-
3. -s-
4. -
5. -
6. -s-
7. -
8. -
9. -
10. -s-
1) the, the
2) a, of
3) the
4) a, a
5) the, the, -