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.
3 вместо at - to
5 вместо go - ride
6 вместо ride - go
<span>1. The letters have already been signed. - Present Perfect Passive - Письма уже подписаны.
2. The goods had been delivered by the 15th of July. </span>- Past Perfect Passive -<span>Товар был доставлен к 15 июля.
3. The invitations to the party will have been sent by Saturday. </span>- Future Perfect Passive - <span>Приглашения на вечеринку были отправлены к субботе.
4. The World Trade Organisation was formed in 1994 to promote free trade.</span> - Past Simple Passive -Всемирная торговая организация была создана в 1994 г. с целью содействия свободной торговле.
1)under
2)in front of,between
3)on
4)under
5)on
6)on
7)in
8)in
9)on
10)on